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A
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responded promptly to my phone call and took time out in his very busy schedule to inspect the sagging floor on our second floor row home." He provided a rough estimate for the structural work and a bathroom remodel.
was very professional, extremely informative and projected the type of work ethic I was beginning to think didn't exist. I am certain
would provide A+++ services. I would definitely use this provider.

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and his crew are very good with communicating before, during, and after the project. I'm very happy with the end result." Their price is on the upper end, but sometimes you just need to pay for quality.

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Local Articles in Philadelphia

Have a foundation crack? Consult a structural engineer

Are you worried about a crack in your home's foundation. A structural engineer can examine the crack and determine if your house is safe or hazardous to live in.

Structural Engineers

Your home's ability to withstand the forces of nature and gravity depend on good structural engineering. Building room additions, correcting foundations and repairing structural damage are all projects that call for a structural engineer's expertise.

Interior remodeling project, in progress.
Remodeling - General, Structural Engineering

Dear Angie: How much should it cost to remove a wall? We want to take out about 9.5 feet of a wall that runs from an exterior wall of the house to an interior wall. – Jenny H., Tampa, Florida

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Contractors say homeowners with this trait are the most satisfied with home improvement projects.

earthquake retrofit
Remodeling - General, Structural Engineering

Earthquakes can strike out of nowhere and cause major damage to your home. Consider these tips to protect your home from earthquake damage.

bowed interior block foundation wall
Structural Engineering

Does your home have horizontal cracks in its concrete block foundation? Check out these common causes and repairs for horizontal foundation cracks from a highly rated structural engineer.

Angie's Answers

?

This can be maddening. Over the past 40+ years, in 4 houses, I have had or have run across this problem from gas meter leakage, water well pump column vibration, doorbell transformer, circulating pump, an extremely small (mist spray) water pipe leak, flourescent and sodium lights, security system horn dead battery, gas meter leaking slightly, bees in wall, bat colony, electric typewriter left on, stereo left on very low, and speaker inductive hum.

This seems to be a popular and recurrent question, so I am going to give the long answer for use by future questioners too.

I am assuming you do not hear this noise away from your house, or that other family members can hear it to. Obviously, if you hear it elsewhere also and other family members cannot hear it, then maybe you have tinninitus or are hearing your own high blood pressure blood flow (seriously). This commonly gets more acute at night when it is quiet, so all you are hearing is your internal ear sounds. I had this happen once because of a middle ear blockage - drove me crazy, getting up in the middle of the night because I thought I heard a water leak through the walls. Try putting on a pair of earmuffs or hearing protectors - if you still hear it or hear it louder, this is probably the case.

One method if hum is on the clearly audible side is make a 2 foot long cone out of paper to hold against your ear - like an antique hearing horn - then in each room face each of 4 directions while listening for where sound is the loudest, and turn your head to pinpoint the exact direction - I would spend 10 minutes doing this before getting into detailed stethoscope listening.

Otherwise, sounds like time for the old stethoscope (about $12 at a drug store - get a metal soundhead one, not cheap plastic, which does not pick up vibration as well). Also, if you are older (say over 35 or so) your hearing might have started to deteriorated with age, so if you have children or grandchildren with sharp hearing, they might be able to help track it down. I am sure a young child or grandchild, if you have one, would love this sort of treasure hunt (with appropriate "treasure" for a reward for tracking it down). 

Being careful not to come in contact with electricity with the stethoscope, check all the likely sources listed below. Start by placing it against pipes and walls and floor in each room of the house - water sourced noise goes a long ways, and tends to reverberate in the walls, so if that is the source likely to hear pretty easy. Hold stethoscope against bare pipes, both hot and cold, and heating system radiators or hot air vents.

If listening to water and hot water heating pipes indicates it is not water sourced, then you could turn off the master (outside) breaker or all the inside breakers and see if it goes away. I would only do this during above-freezing weather and early on a weekday, just in case a breaker fails to turn back on correctly when you switch it. Older master breakers particularly, which typically have never been used, sometimes break or fail to reclose properly after being shut off, so then have to be replaced. You want to be doing this at a time of day when, if necessary, you could get an electrician in the same day to replace it without paying weekend or nighttime emergency call rates.

If turning off the master breaker (or all other breakers) eliminates the hum, then turn them on one at a time until you find the one that turns the hum back on, then track where that circuit likely feeds (hopefully it is labelled) and check every switch, outlet, and light fixture.

Humming sources include (not in any particular order, a + in front means likely or common source of humming, - means rare or not likely):

1) + toilet fill valve - slightly leaking toilet inlet valve (listen where water tubing comes into toilet tank, and look inside tank to see if there is any water flow into or ripppling of the water in the tank or the bowl, or from the bowl filling tube (usually a small black plastic flexible tube which comes out of the fill valve (usually far left side of tank) and is clipped onto and discharges down into a hollow vertical brass or plastic tube or pipe in the toilet tank, which refills the toilet bowl after you flush)

2) + leaking faucet - kitchen, tub, shower, sink, utility tub, etc - it is amazing how just the smallest valve leak can make a hum or hiss that you can hear through the walls (especially at night), but only drips every few seconds.

3) - electric service meter dial motor

4) - electric breaker panel - rarely, a loose main power feed to a panel (especially with aluminum main service wire) will get loose enough that it vibrates back and forth and hums in its connector. A loose bus or snap-in breaker slot cover plate in the panel can also do this rarely

5) - gas meter or overpressure vent (unlikely, as you have had it replaced)

6) + boiling in the bottom of hot water heater or boiler because of buildup of lime, but would usually be intermittent - only when unit is heating

7) + furnace fan or electrostatic filter (forced air heat), or circulating pump (hot water baseboard heating), or steam condensate pump or overpressure venting (steam system).

8) - gas control valve or electric control box on a gas furnace, or its transformer (most have a 120V to 24, 16 or 12V transformer inside the front of the furnace

9) + air filter or electrostatic filter alarm on forced air furnace - some have a passive "whistle" opening that sounds softly when the filter is getting blocked, and if blocked with dust could make a hum rather than a whistle.

10) + Some water softener systems also have an "alarm" device to tell you it is time to service the unit, so check that if you have such a unit.

11) - a slightly leaking overpressure/overtemp valve on hot water heater or furnace (would be dripping)

12) - air venting from the air vents on hot water heating system. These will commonly make a hum or wheeze sound, for only for a few seconds at a time - not continuous unless leaking water

13) - city water system booster pump sound through the water column (if there is one near your home) - listen at the incoming water pipe - if much louder there than at other pipes within the house, that could be a house, though unlikely. If you think this could be it, find your water shutoff valve (typically 10' into your lawn from the street) and listen there. Would also be audible at neighbor's service pipe if that is the source.

14) - gas system compressor sound coming through gas pipe - listen to gas pipe outside the house and inside the house near furnace - if louder outside,, this could be a possible source, but the compressor or pressure reducer would have to be near your house. Would also be audible at neighbor's service pipe if that is the source.

15) + auxiliary booster circulating pump in your hot water or steam heating system (there may be one separate from the furnace, likely in the basement or a utility closet - most commonly found on  multi-unit apartment building with central heating and in 3 story or higher buildings, but you never know)

16) + a water leak, either inside or a leaking hose bib or pipe, or in your service pipe coming to the house

17) - electric on-demand water heater or electric-powered water filtration unit under the kitchen sink or inthe basement

18) + refrigerator compressor or fan hum

19) + doorbell transformer (front or back door - transformer is usually NOT at the doorbell, it is usually mounted in an open space like nailed to a basement joist, in an entry closet, or in the cubby space under the stairs - always physically near to the door, but NOT always on the same floor)

20) - any instant-on device like a TV

21) + any audio device (stereo, iPod, music player dock, computer, etc) that may have been left on at very low volume. Also, VERY rarely, if stereo or external speaker wires are run close to and parallel with an electric wire in the wall, they will acquire an  inductive voltage and hum.

22) + anything with a transformer, including stereo, add-on computer or iPod speakers, battery charger (rechargeable batteries or spare car battery or rider mower or boat battery charger), any portable electriconic device. Also portable device chargers (computer, iPod, cell phone, etc) - even if the device is not plugged into the transformer, as long as the transformer (charger) if plugged into an outlet, it is transforming high to low voltage, and transformers commonly hum

23) - electric typewriter left running

24) - electric ultrasonic cleaner or denture cleaner or electric toothbrush left on 

25) - home hair drying hood left on

26) - a lint buildup-jammed bathroom, kitchen, or attic fan. Many of these have, for safety, so called "self limiting" motors that if they jam just sit there and hum, but do not burn out.

27) - an attic cooling fan whose thermostat has failed, so is on all the time

28) - electronic furnace thermostat

29) + air conditioning unit, or aquxiliary air conditioner evaporator

30) + humidifier / dehumidifier - either permanently installed or portable

31) + portable heater / fan / air purifier

32) - automatic animal feeder waterer - either water supply or electric, as applicable

33) - dishwasher motor runningcontinuously - not shutting down after end of cycle

34) - convective or direct-vent oven or cooktop exhaust fan not shutting off

35) + flourescent (tube or CFL) or sodium or halogen light bulb / ballast hum (either inside, outside front door fixtures, or public street lights). These can hum quite pesistently when the starter circuit sticks on, or the bulb is dying and will not start (light completely), so the started circuit tries continually to start the lamp - can make a hum audible up to a block away on street lights.

36) - a dying electronic photocell designed to turn on your outside lights

37) - home security system, especially its alarm or horn. If the alarm is sounding but for some reason the main power is not getting to it, then as the battery goes dead (or if full voltage is not getting to it) is can give off a squeek, hum, or rasping sound - ditto if insects like wasps or hornets build a nest in it, so it cannot sound correctly.

38) + well pump, pressure tank, or filtration system, if you are on a well

39) + insect or bat nest in the attic or walls or in outside bins or cupboards, electric panel/meter, or outside telephone connection box (bees /wasps / hornets most likely) - though this usually varies by time of day, although it would "pulse" at the time of day when they are waking up or going to sleep.

40) + carpenter ants or termites - their continuous chewing of the wood can sound like a hum till you get right up against the colony, then you can actually hear the chewing

41) - a regional hum, as has been occurring at times in Ohio, Wisconsin, and Arkansas - where micro-seismic activity causes a hum or booming sound. Google or call your local paper and see if anyone has been reporting this in your area.

42) + outdoor power service transformer - either a metal (typically army green or gray) about 1 foot diameter "can" mounted on a power pole if you have overhead service, or a 2-3 foot cubic metal box on the ground or in a manhole pit near the street if you have underground service, which usually serves 4-6 houses (so may be in a neighbor's yard) and will have a voltage rating marked on it, usually in yellow stick-on lettering - like 4160V - 220V. Usually has high voltage - keep away safety markings on it.

43) - you have found where the Caddyshack gopher (who hummed to himself) moved to after Bill Murray blew up his happy home at the golf course.

Hope this list helps you (and future users with the same question).

?

There is NO such thing as an average cost !

 

You are going to be required to have a building permit and the Building Comissioner

or Senior Permit Official of your local permit office will issue a determination as to whether you will be required to have a Steel Bearing Beam , a Laminated Bearing Beam or some other Beam to support weight of the structure you want to ammend . You  may also be required to install Bearing support posts footings,  at either end of the beam as well. Much will depend as to what is over  and under the space that you wish to span .The official may require you to retain an Architectual Engineer to perform a Load study and computations and require you to  comply with his recomendations .

 

 Until you know what is required by the Permitting Office , Then and only then will you be able to determine the true costs .

 

The fact that you have existing baseboard heat , and we know NOT if it is electric or radiant baseboard heat will complicate the issue as well the existing electrical outlets which may need to be sunken into the floor in order to maintain the electrical circuitry as it exists.

 

 Past experience in these matters , indicate possible costs to range from  $4000.00 to  as much as  $8k -$10,000.00 . I realise that these cost ranges are probably NOT what you want or expect , but There are too many unknowns to attempt a closer cost expectation or range of expenses !

?

Architect first - for around $1000 typically you will get site consultation, a few sketches showing what you said you wanted, and a preliminary (by the book) cost estimate - that you can use to figure if your budget or scope of work needs major adjustment. Then, if you go ahead, typically about 10-20% of total project cost for complete plans and specs (including above cost), depending on complexity and level of interior design detail, and if construction inspection services are included.

 


 
 
Generally, nothing is free with an architect - unlike a contractor where a bit of consultation and a rough estimate is a lead-in to the actual work he hopes to get (the construction/repair) and part of his bidding cost, an architect (and engineer) makes his living giving advice and consultation and developing designs and cost estimates - so giving it away for free is sort of like a dentist doing sample fillings for free. Some will come to your house to discuss your concepts for 15-20 minutes for free, basically to see if they want to take you on as a client or feel your job is the type or size they want, but you should expect little or nothing in the way of a design or cost estimate for free - the most you might get would be an opinion on whether it sounds, off the cuff, like your budget is roughly in line with your desired scope of the project.
 
 
On more complex or up-scale remodels, it is not unusual to contact several architecture firms and request proposals - where they basically come see the site, then give you a sketch or few or more common today, computer-generated altered photos of your place, showing conceptually what they can do for you, then you choose the one you like the most and go with that one for final design. Typically $500-1000 range fee (each) to get that done for small jobs, larger jobs will typically be no charge but that assumes probably $25-50,000 plus anticipated fees if they get the job.
 
 
Bear in mind in the latter scenario you cannot pick and choose betweenthe best parts of each proposal - the architect owns the design and it is copyrighted, so while you can choose bui9lding elements (dormers, bay windows, etc) from any of the proposals, specific design or color combinations are copyrighted by the proposer.
The Search the List category is Architects and Building Design.
?
Here is a link to a recent diagnosis exercise I just went through on another similar question - might be of some interest to you, though that case is likely duct related whereas your I think may be outside - http://answers.angieslist.com/What-causing-loud-banging-clicking-noise-q141018.aspx In your case however, and especially with the only on very cold night issue and especially more early in winter, my first, second and probably third guess would be the deck. Baseboard heating pipes commonly creak, pop, and sometimes squeek as they expand and contract, but unless the pipes are jamming up where they come out of the floor so they make the baseboard radiator "pop", they usually do not "bang" like steam pipes do. And would sound like someone accidentally kicking the baseboard like a minor clang or thump - and typically quite metallic sounding in that case. The jut out on the house could make the noiseif it is heating and cooling signifiantly, but with constant heat in the house I would doubt it - that noise can occur on occasion due to siding being installed without adequate expansion gaps at the ends of boards or edges of panels. Usually if that is the problem, though, you will get bulging or end-cracking or splitting of the siding oer time. Plus of course the expansion and noise occurs in HOT conditions (usually direct sunlight on hot days), not in the cold of winter. Deck, especially in early winter as they initially freeze and the moisture content in the boards is typically high, tend to thump quite hard as they freeze - commonly sounds about like someone jumping up high and landing hard on the deck in boots, or maybe like someone hitting the far end of the house with a sledgehammer. Not uncommon to actually feel the thump while in your bed. What is happening can be one of several things: 1) most commonly, moisture in the boards is freezing causing expansion - till eventually the board(s) pop a nail, or break free of the frost holding them to the support boards. They freeze at the joists first because that is where the free water is and is accessible to the air all around so it freezes hard first, then as hard freezing conditions persist through the night the water in the boards themselves expands, causing the board to eventually break the ice bond - or in extreme cases to push hard enough against the end of the next board to break it free. This commonly happens from a couple to around 4-6 hours after evening hard freeze sets in, so commonly about midnightish as opposed to early evening or early AM, in normal daily temperature fluctuation conditions. This can easily happen to several boards in one night, and if thawing in the daytime, or especially if getting rained on or getting snow meltwater again, can become more frequent for awhile then taper off a few days to a week or so later. 2) decks are basically built as a single unit without specific expansion provision, but are semi-rigidly fastened in place by the piers and commonly rigidly fastened along the house edge - so any expansion or contraction creates stresses in the deck which eventually can get strong enough to cause popping and creaking and thumping noises. Because it is rigidly constructed, the stresses (from moisture or freezing or on large decks even just daily thermal changes) can accumulate fairly well before something releases, so the thump or bang can be quite loud. 3) if your support posts (on decks with outer edge support piers/posts and fastened to the house with a ledger board) are frost heaving, then they lift the deck upwards at the outer edge, which can cause sounds from nails prying out of the house as the ledger board tilts up - or in extreme cases ripping out of lag bolts or joist hangers. Check to be sure your ledger board is not tilting away form the house at the bottom, and that the deck is not tilting up significantly at the outer edge. 4) sometimes the freezing water in the deck boards can cause splitting of the board, which makes a tearing or ripping sound usually, rather than a thump. 5) occasionally, frost heave in the ground under the stairs can lift the stairs, causing tearing or ripping where it is fastened to the deck. While disturbing, this sort of noise (in moderation) does not normally "damage" a deck, though of course it does cause a general loosening up of fasteners over time, and sometimes snaps deck nails or screws (screws more often because they are generally higher stress steel, so can't yield as much before snapping). Of course, significant frost heaving does need to be taken care of - by solving the cause (footings bearing on/in frost heave susceptible soil) or by releveling the deck periodically if a slow, gradual year-by-year heaving of the foundations. Measures to take - just visually inspect the deck and alll support posts and connections periodically (every year or two) for broken or loose ones, but generally unless deck board fasteners break, you will not see anything except maybe a few nail heads sticking up. And check it with a level to be sure the outer edge is not lifting up due to frost heaving of the piers, and adjust back level (hopefully you have adjustable piers/posts).
?
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The key is to have drainage away from the house, and not introduce water to the foundation unnecessarily. If you can slope the existing backfill soil from the foundation away from the house at least 1/2 inch to 1 inch in the 2 foot space to the walk and pack it down, then putting a ground cover on it will not hurt - it is the relatively impervious layer sloping away from the house you want. If you use rocks I would underlay them with some 6 mil or thicker black plastic sheeting (available in small rolls at home supply stores and lumber yards). If planting, the same would be nice if the plants you choose spread laterally like Epimedium, so they will grow in just a fewe inches of topsoil over the plastic. Otherwise, tamp down the dirt to make it a hard, draining surface (at least when it rains heavily) before topsoiling and planting. Keep a slope on the topsoil too, and avoid overwatering. Do not plant anythig with highly invasive, tenacious or deep burrowing roots like bushes, ivy, or trees near the house, as the roots will penetrate the waterproof barrier on the outside of the foundation, and then you might start getting leaks. The roots can even penetrate the concrete block joints and start breaking up the foundation. For this reason, annual flowers, shallow-root ground covers, bulb plants and rock gardens are far better within 3 feet or so of the foundation than larger plants or intensive gardening.

Structural Engineering reviews in Philadelphia

A

Rating
We asked for an estimate - he gave one over the phone since we didn't own the house yet. Was helpful to get the budget number that we needed and saved himself a trip. Sounded more than willing to come out once we owned the home.
- Kevin M.
A

Rating
Philadelphia Structural Engineers Provider Name Locked
Grimadli received the report from FEI construction and followed through in a superior way and did complete what the report stated must be done. His crew was large and professional and no fooling around. Just fabulous. And I had two other structural engineers over the years that I have lived in this house, and both
Philadelphia Structural Engineers Provider Name Locked
in comparison to Jor
Philadelphia Structural Engineers Provider Name Locked
. I can't believe that I finally connected with a Structural Engineer and Contractor who were above board, did superior work and did not rip me off;
- Carol S.
A

Rating
Fabulous, team of workers arrived each morning, worked without stopping and at end of day everything was cleared up, cleaned up and taken away as if they were never there. Unbelievable job. The first time I was not ripped off by contractors.
- Carol S.
A

Rating
We were very scared once we realized we had foundation damage when replacing a patio.
Philadelphia Structural Engineers Provider Name Locked
was great though, they were out the next day with an estimate and walked us through what needed to be done, what should be done, and what could be done. It was done quickly and they even helped us with other minor repairs. We will definitely be looking to them for the future.
- Jonathan S.
A

Rating
The evaluation and subsequent report were very high quality. Given that the house was occupied at the time of the structural inspection, the information gleaned was fairly thorough. The inspector was himself a structural engineer and very open in discussing his observations and answering my questions. The inspection took a couple of hours, focusing on the foundation and basement. The basement was unfinished and this provided an opportunity to inspect the floor joists and other structures that tied into the foundation. This is important since if these types of structures are concealed, the inspection is likely to be incomplete, even though other observations may suggest no structural issues are present. The other floors (3 total not including the basement) were also inspected, with extra time devoted to cracks (on walls and tile floors) and disjointed structures (such as window and door frames). Miscellaneous floor sections, steps, and walls were checked for level and plumb. After the full inspection, the engineer discussed his observations and noted some key areas to keep watch on and/or look into repairing. These were also mentioned in the final written report. This final report was provided within a few days of the inspection and signed off on by a PA licensed engineer. Although the report did provide pictures to supplement the text, they did provide higher resolution pictures on request. Overall an excellent experience and it provided me with a good amount of information. I would certainly recommend BE Structural. Anyone buying an older house, it is worth the investment in this inspection (in addition to your regular home inspection).
- Christopher C.
A

Rating
Philadelphia Structural Engineers Provider Name Locked
arrived on time at my house to assist me identifying needed repairs to my house for possible sale.
Philadelphia Structural Engineers Provider Name Locked
is a very knowledgeable, friendly, and honest professional engineer. He has a "sharp eye" and found several areas needing correction, things I would never have thought of. He answered my many concerns in a supportive and thorough manner.
Philadelphia Structural Engineers Provider Name Locked
developed thorough documentation and, on his own initiative, promised to provide this information to a reliable contractor in a manner which I would not have been able to.
I am very fortunate to have found
Philadelphia Structural Engineers Provider Name Locked
through Angie's List and to be the beneficiary of his experience, integrity, and kindness. I highly recommend
Philadelphia Structural Engineers Provider Name Locked
.
- Thomas W.
A

Rating
Philadelphia Structural Engineers Provider Name Locked
and his team were great. We had an emergency structural issue in our house that was already being renovated by another contractor. Our new second floor bathroom was sagging and our stairwell header on the first floor was poorly done before we bought the house.
Philadelphia Structural Engineers Provider Name Locked
sensed our urgency and came the very next morning. He walked us through the options, and even gave us a trial of the work, saying if didn't like what they did, we could walk away. His crew came at 8 AM the following day (2 days from our call) and worked ALL DAY to fix the issue. No need for a trial - he fixed it immediately. It was like magic. Some of the grout work in our second floor bathroom cracked because of the jacking, but he had his grout guy come back and redo it after we let it settle for a couple of weeks ... free of charge!
Philadelphia Structural Engineers Provider Name Locked
is not only a professional, but a real like-able guy - You can tell he understands how to run a business, both on the operations and marketing side. I hope others have a similar experience, but if you have a
Philadelphia Structural Engineers Provider Name Locked
to work with him, we highly recommend it.
- Anthony D.
B

Rating
Great. Gave me good advice also on the repair work I was seeking on front steps and patio brick work.
- Mattie S.

All Structural Engineers in Philadelphia

Companies below are listed in alphabetical order. To view top rated service providers along with reviews and ratings, Join Angie's List Now!

3 D TECHNOLOGIES

972 GLEN WILLOW RD
Avondale

A A Action Waterproofing Inc

410 S Camp Meade Rd

A H SAMPLE INC

7527 EASTON RD
Ottsville

A S PEIPER

FRONT & FORD ST
Bridgeport

A W LOOKUP CORP

500 Fayette St Ste 100
Conshohocken

Accu-Claim Adjustment

2058 County Line Road #208
Huntingdon Valley

Accusource Services Water & Fire Restoration

225 Lincoln Hwy
Fairless Hills

ACORN ENGINEER

254 CHAPMAN RD

ACR ENGINEERING CORP

117 CLEMENTS BRIDGE RD

ADF ENGINEERING INC

PO Box 15
Havertown

ADF ENGINEERING INC

219 GLEN GARY DR
Havertown

ADTEK ENGINEERS

9990 Fairfax Blvd Ste 300

ADVANCED SIMULATION TECHNOLOGY

26 REGENCY PLZ
Glen Mills

Advanced Stucco Inspection

1005 Sussex Blvd
Broomall

ADVANCED WASTEWATER ENGINEERG

103 S HIGH ST
West Chester

ADVANTAGE ENGINEERING

1101 Laurel Oak Rd

AIRWORKS CO

2993 ARTMAR RD
Norristown

AKF ENGINEERS

700 ALEXANDER PARK

Alan Blair & Associates

211 Cross Keys Rd

ALBION ENGINEERING CO

1250 N CHURCH ST

ALFA LAVAL

1635 MARKET ST
Philadelphia

ALL 4 INC

2393 KIMBERTON RD
Phoenixville

ALL IN 1 CONTRACTING

521 BRIGHTON RD
Collegeville

ALON ENGINEERING ASSOC INC

610 LOUIS DR
Warminster

ALSTOM POWER

735 Fox Chase Ste 112
Coatesville

Alta Design

948 Matsonford Rd
Conshohocken

Andrew T. Ronon , Contractor

204 Grayling Ave
Narberth

ANN ROTHMANN PE

100 E LANCASTER AVE
Wayne

ANTHONY LIEZE CO

2907 PENNSYLVANIA AVE

APANTEC LLC

506 STUMP RD
Montgomeryville

ARDENT ENGINEERING

1355 PENNSRIDGE PL
Downingtown

ARKK Builders LLC

2106 New Road

ARORA ENGINEERS INC

61 WILMINGTON W CHESTER PIKE
Chadds Ford

ARVE HOLT INC

4 FERN LN
Wallingford

ATI RESEARCH

770 TOWNSHIP LINE RD
Morrisville

ATLANTIC AQUATIC ENGINEERING

1823 DEEP RUN RD
Pipersville

AUTOMATION DESIGN ENGINEERING

603 EASTON RD
Willow Grove

AXENS NORTH AMERICA INC

650 COLLEGE RD E

B P & ASSOC

560 PEOPLES PLZ

BAKER INGRAM & ASSOC

2 WHITE HORSE PIKE

Barlow Construction Co

37 Village Way
Malvern

BARRY-WEHMILLER DESIGN GROUP

555 CROTON RD
King Of Prussia

BATTELLE

301 S State St Ste N001
Newtown

BERNHARD SHIPPS & ASSOC

505 S Lenola Rd Ste 210

BETZWOOD ASSOCIATES

523 KIMBERTON RD
Phoenixville

Bibbo Builders

105 Sleepy Hollow Pl

BIOGENIE CORPORATION

2085 QUAKER POINTE DR
Quakertown

Bold Construction, LLC

3648 Greenwood Cr
Chalfont

BRECHER ASSOCIATES

731 WYNNEWOOD RD
Ardmore

BRUCE E BROOKS & ASSOC

2209 CHESTNUT ST
Philadelphia

Bruce Ensor Structural Engineer

500 N Front St
Lemoyne

C M Scanlon

Narberth

CARROLL ENGINEERING

949 EASTON RD
Warrington

CASSIO ENGINEERING INC

5013 DEER DR
Downingtown

CATARACT CENTER

830 OLD LANCASTER RD
Bryn Mawr

CDM FEDERAL PROGRAMS CORP

993 OLD EAGLE SCHOOL RD
Wayne

CET ENGINEERING SVC

3 INTERPLEX DR
Feasterville Trevose

CGS ENGINEERING SVC

1290 BALTIMORE PIKE
Chadds Ford

CHARLES E SCHOEMAKER INC

1007 EDGE HILL RD
Abington

CHESTER VALLEY ENGINEERS

520 W STATE ST
Kennett Square

CITIES ENGINEERS REPS

601 E PEARL ST

CLARKE CONSULTING INC

680 DICK AVE
Warminster

CMC ENGINEERING

ROUTE 30 & MANOR AVE
Downingtown

CMT General Contractors Inc

63 Colonial Park Dr
Springfield

COAL TECH CORP

275 N HIGHLAND AVE
Merion Station

COLIN FM GOLDING ENERGY SAVING

126 SWEDESFORD RD
Berwyn

COMPU DESYGN CORP

7500 GERMANTOWN AVE
Philadelphia

CONESTOGA-ROVERS & ASSOC

410 EAGLEVIEW BLVD
Exton

Constructonomics

1926 Christian Street
Philadelphia

CONTAMINATION CONTROL

120 N WARREN ST

CONTEC SYSTEMS INDL CORP

1566 MEDICAL DR
Pottstown

CONTROLLED VIBRATIONS INC

5118 Valley Park Rd
Doylestown

COPPUS ENGINEERING CORP

643 RIDGE PIKE
Lafayette Hill

CORRPRO COMPANIES INC

83 PINE MILL CIR
Doylestown

CORRPRO COMPANIES INC

1380 ENTERPRISE DR
West Chester

COSTON ENTERPRISES

243 W Broad St # 2

Country Lawn and Landscape Inc

618 Laurel Rd.
Coatesville

Craft Pro Masonry Restoration Inc

1230 E Mermaid Ln
Glenside

CREEK ENGINEERING & REFRACTORY

200 S FRANKLIN ST
West Chester

CRITERIUM JAGIASI ENGINEERS

1500-B SHALLCROSS AVE

CVM ENGINEERS INC

85 OLD EAGLE SCHOOL RD
Wayne

D Mallozzi Concrete & Blacktop

2902 Pickertown Rd
Warrington

Daniel Banks Structural & Engineering

918 Remington Rd
Wynnewood

Daniel Fair Construction

700 Lincoln Ave
Willow Grove

DAS ENGINEERING CONSULTANTS

120 COTTON ST
Philadelphia

David Biche Custum Builders

38 E Essex Ave
Lansdowne

DELPHINUS ENGINEERING INC

340 BALDWIN TOWER BLVD
Crum Lynne

DENIS E FORREST

1317 Harness Ln
Chester Springs

DESIGN SOLUTIONS CO INC

20 CONCORD CREEK RD
Glen Mills

DI GENOVA ASSOC INC

1212 GERMANTOWN PIKE
Plymouth Meeting

DIANA CORP

854 BRINTONS BRIDGE RD
West Chester

DIMENSIONAL CONTRACTORS

PO Box 189
Buckingham

DINAS ENVIRONMENTAL

7703 MAPLE AVE

DMJM AVIATION

2 INTERNATIONAL PLZ
Philadelphia

DOT ENGINEERING

3000 ATRIUM WAY

DREXELBROOK ENGINEERING CO

205 KEITH VALLEY RD
Horsham

DUMACK ENGINEERING

PO BOX 487
Penns Park

DYNAMIC DEFENSE MATERIALS

1515 GARNET MINE RD
Marcus Hook

E T TECHTONICS

213 MONROE ST
Philadelphia

E-M TECHNOLOGIES

160 SUMMIT LN
Bala Cynwyd

EARTH ENGINEERING INC

1717 SWEDE RD
Blue Bell

EASTERN STATES ENGINEERING INC

250 GIBRALTAR RD
Horsham

EATON CUTLER-HAMMER

7 CHELSEA PKWY
Marcus Hook

EBERT ENGINEERING

4092 SKIPPACK PIKE
Skippack

EDM CONSULTANTS

1101 S BROAD ST
Lansdale

ELECTROMAGNETIC POWER LINE

106 W UPPER FERRY RD

Elite Builders Inc

428 Miller St
Philadelphia

ELTON & THOMPSON PC

2615 JENKINTOWN RD
Glenside

EMERALD CREEK LLC

535 N LEWIS RD
Royersford

EMP ENGINEERING SVC INC

1580 DERRY DR
Dresher

ENGINEERED SYSTEMS & SVC

310 BROAD ST
Harleysville

ENGINEERING SUPPORT INC

1440 PARKWAY AVE

ENGINEERING SUPPORT PERSONAL

1301 EASTON RD
Horsham

ENGINEERS NJS

2405 SE HORTON RD
Newtown Square

ENVIRO-TECHNOLOGY INC

123 W BROAD ST

ENVIROGUARD

11 DAVIS RD
Phoenixville

ENVIRONMENT 2000

10 FRANKLIN RD
Kemblesville

ENVIRONMENTAL ENGINEERING INC

1690 SUMNEYTOWN PIKE
Kulpsville

ENVIRONMENTAL MANAGEMENT INTL

128 GLENEAGLES DR
Blue Bell

ENVIRONMENTAL STANDARDS INC

1140 VALLEY FORGE RD
Phoenixville

ENVIRONMENTAL TESTING & INSPCT

PO BOX 260
West Point

ERM GROUP

350 EAGLEVIEW BLVD
Exton

ESW AMERICA INC

200 PROGRESS DR
Montgomeryville

F E SYSTEMS INC

138 SUSSEX RD
West Chester

FALCON ENDINEERING LLC

3 INTERPLEX DR
Feasterville Trevose

FALCON POWER INC

30 GRIFFITH ST

FAZ ASSOC

1387 BRYANT CT
Ambler

FEINFOCUS USA INC

3545 QUAKERBRIDGE RD

FIRE DOCTOR

324 NEW BROOKLYN RD

First State Home & Garden, LLC

812A South College Ave.

flannigan russo contractors

525 NEWTON LAKE DRIVE

FLEXO INKING TECHNOLOGIES LLC

306 KEYSTONE DR
Sellersville

FLUOR CORP

3000 ATRIUM WAY

FLYING K DEVELOPMENT

118 OVERLEAF DR
Thorndale

FORENSIC ENGINEERING RESOURCES

2014 FORD RD
Bristol

FRALINGER ENGINEERING

590 SHILOH PIKE

Franklin Engineering, Inc.

P O Box 2622
Bala Cynwyd

FURST ENGINEERING INC

146 Willow Grove Rd

FXO INC

501 FORRESTAL RD

G H WEAVER PE

3 E MINER ST
West Chester

GANNETT FLEMING TRANSIT SYSTEM

1010 ADAMS AVE
Norristown

GARVEY RESOURCES INC

407 S STONE RIDGE DR
Lansdale

GEMINX BIOTECHNOLOGIES

16 THERESA DR
Malvern

General Remodeling Group

11722 Newbridge Crt, Reston, Virginia 20191

GEO TECHNOLOGY ASSOC

2405 John Fries Hwy
Quakertown

GEOCHEMICAL ENGINEERING INC

600 W GERMANTOWN PIKE
Conshohocken

GEOSTRUCTURES INC

985 OLD EAGLE SCHOOL RD
Wayne

GEOTECH INC

2990 ROUTE 73 N

GIBBS & COX INC

4747 S BROAD ST
Philadelphia

Global Building Group

626 N. Front Street, 3rd Floor
Philadelphia

GRAF ENGINEERING

595 BETHLEHEM PIKE
Montgomeryville

GREENBERG ENGINEERING CO

PO BOX 451
Bala Cynwyd

GRIMALDI CONTRACTORS

1 CALEB WAY
Elkins Park

GSA CONSULTING ENGINEERING

370 REED RD
Broomall

GTA INC

1612 SCHWENKSVILLE RD
Schwenksville

GZA GEO ENVIRONMENTAL INC

501 OFFICE CENTER DR
Fort Washington

H T ENGINEERING

1741 VALLEY FORGE RD
Worcester

HAKS ENGINEERS PC

1500 JOHN F KENNEDY BLVD
Philadelphia

Hammond Remodeling

14 Karrens Way
Downingtown

HANA ENGINEERING INC

325 CHESTNUT ST
Philadelphia

HARDESTY & HANOVER

850 BEAR TAVERN RD

HARROW CONTROLS INC

255 Tabor Rd
Ottsville

HAZEN & SAWYER

801 MARKET ST
Philadelphia

HEINRICH & KLEIN

480 HERALD DR
Ambler

HENIEN & ASSOC INC

90 S NEWTOWN STREET RD
Newtown Square

HERITAGE ENGINEERS

438 Ganttown Rd Ste A2

HERITAGE TECHNICAL SVC INC

1240 W CHESTER PIKE
West Chester

HNTB CORP

1628 JOHN F KENNEDY BLVD
Philadelphia

HOFMEISTER ENGINEERING

26 SUGAR HILL DR
Telford

HOISINGTON ENGINEERS

10 BARCLAY CT
Newtown

Hoisington Engineers LLC

10 Barclay Ct
Newtown

HOLTEC INTERNATIONAL INC

555 LINCOLN DR W

Home and Hearth Masonry

16 n. 9th St
Perkasie

Home Experts LLC

Two Penn Center Plaza
Philadelphia

Home Inspection Pro

62 Lafayette Ave

HOUSE ENHANCERS

PO BOX 406
Eagleville

HUNT ENGINEERING CO

22 E KING ST
Malvern

Huskies Engineering, LLC

5108 Ravens Crest Drive

HVAC SOLUTIONS

34 FISLER DR

Hydroarmor Systems LLC

191 Yorktown Rd

I H ENGINEERS PC

103 COLLEGE RD E

INNERSPACE BY BUCKWALTER

1361 E Boot Rd
West Chester

INSTITUTE-ELECTRICAL ENGINEERS

200 S 33RD ST
Philadelphia

INTEGRATED MARINE SVC INC

1260 E WOODLAND AVE
Springfield

INTEGRATED SCIENCE & TECH INC

120 E UWCHLAN AVE
Exton

INTEGRITY ENGINEERING INC

554 HIGHLAND RD
West Chester

IVD

301 CIRCLE OF PROGRESS DR
Pottstown

J M ENGINEERING

1540 THREE TUNS LN
Ambler

JACOBS EDWARDS & KELCEY INC

900 NORTHBROOK DR
Feasterville Trevose

JACOBS ENGINEERING GROUP INC

600 BILLINGSPORT RD

JACOBS ENGINEERING GROUP INC

4601 MARKET ST
Philadelphia

James A. Bruni PE

164 Larrison Road

JAMES L CHERRY JR PE

1569 SHADYSIDE RD
West Chester

JAMES SCHIMMINGER CO

100 CLEMSON RD
Bryn Mawr

JAMES T SMITH ENGINEERING

426 PENN AVE
Drexel Hill

JEBTECH

101 FLINT DR
Harleysville

JETLINE ENGINEERING

112 S COLTS NECK WAY

JMW GROUP LLC

4800 FORT MIFFLIN RD
Philadelphia

JOHANNESSEN & LEONE ASSOC

641 COWPATH RD
Lansdale

JOHN LEHMAN NAVAL ARCHITECTURE

211 N 13TH ST
Philadelphia

JOHNSON MIRIMIRAN & THOMPSON

1515 MARKET ST
Philadelphia

JOSEPH A ZADLO

604 N BETHLEHEM PIKE
Ambler

JOSEPH B CALLAGHAN INC

1 HONEY LOCUST CT

JOSEPH B MILLS PE

111 MANTUA BLVD

JOSEPH FUNARI PUBLIC ADJUSTERS

2951 S 16TH ST
Philadelphia

JOSEPH L HOFFMAN & ASSOC

7 E SKIPPACK PIKE
Ambler

K TECHNOLOGY CO

2000 CABOT BLVD W
Langhorne

KACHELE GROUP

1000 WHITE HORSE RD

KACHELE GROUP

100 S Broad St Ste 701
Philadelphia

KACHELE GROUP

140 WHITAKER AVE
Mont Clare

KENDERIAN ZILINSKI

2 W LIBERTY BLVD
Malvern

KEVILLE ENTERPRISES

220 N CHURCH ST

KEYSTONE ENGINEERING GROUP, INC.

590 E. Lancaster Ave
Malvern

KIRSCHEN CO

134 SHASTA RD
Plymouth Meeting

KLEIN & HOFFMAN

1818 Market St Lbby 1
Philadelphia

KLUK CONSULTANTS

2 EASTWICK DR

Knudsen Engineering

955 Horsham Rd
Horsham

KSE ENGINEERING

1900 Am Dr # 201
Quakertown

KULJIAN CORP

3700 MARKET ST
Philadelphia

L W BRADY & ASSOC

510 DARBY RD
Havertown

LANGAN ENGINEERING & ENVRNMNTL

500 HYDE PARK
Doylestown

LANGAN ENGINEERING & SVC INC

30 S 17TH ST
Philadelphia

LANGAN ENGINEERING INC

989 Lenox Dr Ste 124

LAWLER MATUSKY & SKELLY ENGR

1 SENTRY PKWY
Blue Bell

LAWSON BEVAN ENGINEERS

2201 PENNSYLVANIA AVE
Philadelphia

LEACH BROTHERS INC

6721 PARK AVE

LEONARD BUSCH ASSOC

1239 PARKWAY AVE

LIEBERGOTT ENGINEERING CO

1015 FULTON DR
Ambler

LIFE TEK SOLUTIONS

1850 GRAVERS RD
Plymouth Meeting

LIPPERINI ENGINEERING

255 KINGS HWY E

LONG TANN & D'ONOFRIO INC

1516 MCDANIEL DR
West Chester

LONG TANN & D'ONOFRIO INC

3906 CONCORD PIKE

LOUIS J SOVAK PE

304 BROAD ST

LPL FINANCIAL SVC

109 E EVERGREEN ST
West Grove

LRP ENGINEERING

19 PADDOCK CT

LUDWIG ENGINEERING CO

107 E BROAD ST
Hatfield

LUKOFF ENGINEERING ASSOC

1999 STATE HWY 70 E

M-4

715 TWINING RD
Dresher

MAIN LINE ENGINEERING

211 WELSH POOL RD
Exton

MARINO & IRICK

1068 E LANDIS AVE

MARTIN ESPENLAUB ENGINEERING

238 N 22ND ST
Philadelphia

MASSAND ENGINEERING LS PC

WHITEHORSE COMMERCIAL PKE

MATERIAL RESEARCH & DESIGN

300 E SWEDESFORD RD
Wayne

MAXIMUM MECHANICAL

2737 PICKWICK ST
Philadelphia

MC KEAN DEFENSE GROUP

1 Crescent Dr Ste 400
Philadelphia

MC MAHON ASSOC INC

425 COMMERCE DR
Fort Washington

MCG Construction

12545 ramer rd fl 2

MCMAHON ASSOCIATES

840 Springdale Dr
Exton

MECHANICAL MAINTENANCE

2775 FRANKFORD AVE
Philadelphia

Metal Supermarkets

7120 Golden Ring Road

METCON INDUSTRIES INC

4201 CHURCH RD

MGR ENGINEER

1700 N 49TH ST
Philadelphia

MICHAEL A BEACH & ASSOC

200 BIRCHFIELD DR

MICHAEL'S BRICK POINTING

8024 CRISPIN ST.
Philadelphia

MIG ENVIRONMENTAL LLC

1624 NEWPORT GAP PIKE

Morris Home Remodeling

2206 S Bucknell
Philadelphia

MOTION ENGINEERING INC

790 PENLLYN BLUE BELL PIKE204
Blue Bell

MPC Sales and Consulting

37 Collins Mill Rd
Chester Springs

MULHERN & KULP

20 S MAPLE ST
Ambler

MUSTANG BIO PHARM

1600 MARKET ST
Philadelphia

NEPTUNE WATERS EQUIPMENT

204 DEKALB PIKE
North Wales

NOAH LLC

610 LAWRENCE RD

NORDLAND REMODELING

132 BICKLEY RD
Glenside

O'CONNELL ENGINEERING INC

85 Springfield Cir

O'DONNELL & NACCARATO

2401 PENNSYLVANIA AVE
Philadelphia

O'Donnell & Naccarato, Inc.

111 South Independence Mall East
Philadelphia

Oak Tree Engineering, Inc

11 Hockamick Road

OBSERVATION TECHNOLOGIES INC

136 RAILROAD DR
Warminster

ODONNELL NACCARATO & MACINTOSH

1 E UWCHLAN AVE
Exton

Ok Builders & Remodelers Inc

217 Clifton Ave
Darby

OPERATING ENGINEERS

1375 VIRGINIA DR
Fort Washington

OPERATING ENGINEERS JATC

821 FONT RD
Glenmoore

ORIGINAL CONCEPTS DESIGN INC

414 Indian Mills Rd

ORNDORF & ASSOC

4909 OLD HILL RD

ORNDORF SOCKET & ASSOC

112 CRICKET AVE
Ardmore

ORTEGA CONSULTING

101 W POSSUM HOLLOW RD
Wallingford

OUTCOME ENGINEERING & ENVIRNMT

636 Bridle Rd
Glenside

P ANTHOPOULOS ASSOC

822 MONTGOMERY AVE
Narberth

P R ENVIRONMENTAL DESIGNS INC

207 S WHITEHORSE RD
Phoenixville

PAK INTERNATIONAL ENGINEERING

6614 N 7TH ST
Philadelphia

PARADA & ASSOC

13 HOLLY DR

PARSONS CORP

3100 PRINCETON PIKE

Patrick OConnor Inc.

1588 Meadow Lane

Paul Davis Restoration

1758 Allentown Rd # 208
Lansdale

PAULL ENGINEERING

420 KELLY DR

PAYNE ENGINEERING SALES

PO Box 389
Telford

PDM Construction

8012 English Creek Ave

PENN ENGINEERING

5190 OLD EASTON RD
Doylestown

PENNONI ASSOCIATES INC

875 EASTON RD
Doylestown

PFISTERER SOUND ENGINEERING

855 MANSION DR
Huntingdon Valley

PHARMAPLAN NORTH AMERICA

600 WILLOWBROOK LN
West Chester

PHARMASYS

111 BALA AVE
Bala Cynwyd

PHILIPS SERVICES

550 PINETOWN RD
Fort Washington

Pickering, Corts & Summerson

642 Newtown-Yardley Road, Suite 300
Newtown

Pickering, Corts & Summerson

642 Newtown-Yardley Road, Suite 300
Newtown

Pickering, Corts & Summerson

642 Newtown-Yardley Road, Suite 300
Newtown

PILE MECHANICS INC

264 FISHER PL

PLAN B ENGINEERING LLC

1 Neshaminy Interplex Dr Ste 302
Feasterville Trevose

PMC ENGINEERING SOLUTIONS

272 GRUBB RD
Pottstown

PMH ASSOC INC

1217 N CHURCH ST

POPOLI ENGINEERING

920 CROSS LN
Blue Bell

PRECIS ENGINEERING INC

31 E BUTLER AVE
Ambler

PRECISION CAM CORP

725 NEWTOWN RD
Villanova

PRINCETON SATELLITE SYSTEMS

6 Market St Ste 926

PROGRAM 4

735 FOX CHASE
Coatesville

PRUDENT ENGINEERING LLP

1111 W DEKALB PIKE
Wayne

PURCELL ENGINEERING

10 S CLINTON ST
Doylestown

PURITY SYSTEMS

23 MYSTIC LN
Malvern

R E COLEMAN ASSOC INC

1055 ANDREW DR
West Chester

R G VANDERWEIL ENGINEERS

731 ALEXANDER RD

R T ENVIRONMENTAL SVC INC

6468 N BROAD ST
Philadelphia

R V ENGINEERING

RR 3
Elverson

R Z Construction

528 Wartin ac

RAD ENGINEERING

1901 GEHMAN RD
Kulpsville

RAD ENGINEERING

3195 PENN AVE
Souderton

RAILWAY SYSTEMS

1515 MARKET ST
Philadelphia

RICHARD S PANDOLFI INC

606 CONSHOHOCKEN STATE RD
Narberth

RING CONSULTING GROUP INC

512 W 3RD ST
Lansdale

RMT INC

527 PLYMOUTH RD
Plymouth Meeting

ROBERT E LAMB INC

939 JEFFERSON AVE
Norristown

ROBIDOUX ENTERPRISES INC

106 FREEDOM VALLEY CIR
Coatesville

Rock Solid Inc

1501 Cedar Hill Road
Ambler

ROONEY ASSOCIATES INC

211 N Severgn Dr
Exton

ROONEY ASSOCIATES INC

50 W WELSH POOL RD
Exton

ROW GROUP ENGINEERS INC

611 TALL PINES LN
Horsham

RUSSEL E DANIELS PE

1259 PALOMINO DR
West Chester

RUSSELL E BENNER

705 LEHIGH DR
Quakertown

RYAN-BIGGS ASSOC

7 W GAY ST
West Chester

S & H ENGINEERING

1662 LIMERICK LN
Dresher

S D ENGINEERING

200 LAWRENCE RD
Broomall

S T ENGINEERING PROFESSIONALS

990 STEVENS LN
Wayne

S T HUDSON ENGINEERS INC

230 S BROAD ST
Philadelphia

S T HUDSON INTL

487 DEVON PARK DR
Wayne

S-TECH ENTERPRISES

149 AZALEA CIR
Royersford

SAIC INC

180 GORDON DR
Exton

SASS-CO ENGINEERING

274 BERWIND RD
Wayne

SCHICKLING TOOL & ENGINEERING

727 E CLEMENTS BRIDGE RD

SCHNABEL ENGINEERING

1380 Wilmington Pike Ste 105
West Chester

SCHOOR DE PALMA INC

1700 MARKET ST
Philadelphia

SCHOOR DE PALMA INC

102 PICKERING WAY
Exton

SCHOOR DE PALMA INC

1555 BUSTARD RD
Harleysville

SCHWEITZER ENGINEERING LBRTRS

671 MOORE RD
King Of Prussia

SCS ENGINEERS

53 S Main St

SEA INC

1202 WINSTON WAY

SENECA RESEARCH CORP

1037 DREXEL AVE
Drexel Hill

SEVERN TRENT SVC INC

220 Gibraltar Rd Ste 200
Horsham

SHARPE ENGINEERING INC

555 2nd Ave Ste G260
Collegeville

SHIPPEE ENGINEERING INC

4050 SKYRON DR
Doylestown

SIGMA DYNAMICS

11 BRENTWOOD DR
Willow Grove

SISTERS OF ST JOSEPH

107 OLD SOLDIERS RD
Cheltenham

SNYDER ENVIRONMENTAL ENGNRNG

3044 APPLEDALE RD
Norristown

SOUTHWEST SIGNAL ENGINEERING

175 STRAFFORD AVE
Wayne

SPECIALTY ENGINEERING INC

422 MILL ST
Bristol

STANNARD & CO

2850 NICOLETTE CT

STEINMAN ENGINEERS

1300 ROUTE 73 N

STEVEN J LIT CONSULTING ENGNRS

1029 SHERMAN AVE
Huntingdon Valley

STON COR GROUP INC

1 W PARK AVE

Structural Engineering Services

139 Henley Rd
Wynnewood

STRUCTURE DESIGN ASSN INC

160 PARK RD
Downingtown

STYER & ASSOCIATES

412 DEKALB ST
Norristown

Suburban General Remodelers LLC

457 Penn Ave
Drexel Hill

SULLIVAN CO

4709 Edgemont street
Philadelphia

SUMMIT ENGINEERS INC

10 WHITE HORSE PIKE

T & E SOLUTIONS INC

109 FLORAL VALE BLVD
Morrisville

T V DOWD CONSULTING ENGINEERS

2532 Aspen St
Philadelphia

TAILORED TRANSITIONS

304 W WILLOW GROVE AVE
Philadelphia

TAYLOR WISEMAN TAYLOR CHALFONT

1300 HORIZON DR
Chalfont

TBE GROUP

3490 ROUTE 1

TBS Basement Waterproofing

324 Second St Pike
Southampton

TECHNICAL ADVISORS INC

4941 STEPHANIE WAY
Plumsteadville

TECHNICAL DEVELOPMENT CO

24 E GLENOLDEN AVE
Glenolden

TECHNOLOGIES SIONADD

272 ELM CT
North Wales

TETRA TECH EM

300 NECK RD

THERMO SYSTEMS LLC

84 TWIN RIVERS DR

THETA CONSULTING

1948 S Easton Rd
Doylestown

THOMAS L ZEIGLER INC

279 CONTINENTAL DR
Pottstown

THOMAS MOODY & ASSOC INC

PO Box 776
Narberth

TIMBIE ENGINEERS

47 S LANSDOWNE AVE
Lansdowne

Tom Jr. Construction

58 E. church rd
Elkins Park

Tom Natalini Sr. & Son, Inc.

7854 Beverly Blvd
Upper Darby

TOTAL SITE SOLUTIONS

560 PEOPLES PLZ

TPI ENVIRONMENTAL INC

724 S 27th St
Easton

TRACK RENEWAL ENGINEERING INC

4218 PINE ST
Philadelphia

TRANS WORLD TECHNOLOGIES INC

417 Sawyer Dr
Harleysville

TRI-STATE ENGINEERS & LAND

1166 DEKALB PIKE
Blue Bell

TRIAD FIRE PROTECTION

150 SAXER AVE
Springfield

TRIDENT ENGINEERING INC

12 PENNS TRL
Newtown

TSD ENVIRONOMICS INC

1235 BARNBRIDGE DR
Schwenksville

U S FACILITIES INC

1300 E TULPEHOCKEN ST
Philadelphia

U S NELS INC

1701 MARYLAND AVE

UNDERWOOD ENGINEERING TESTING

233 N YORK RD
Hatboro

URBAN ENGINEERS INC

530 WALNUT ST
Philadelphia

URBAN ENGINEERS INC

5800 BUSTLETON AVE
Philadelphia

US ENGINEERING LABORATORY INC

857 SUSSEX BLVD
Broomall

USA ENGINEERING INC

217 CLIFTON AVE
Darby

VALUE STREAM ENGINEERING

1400 MORRIS DR
Wayne

VAN CLEEF ENGINEER ASSOC

4 Aaa Dr Ste 102

VANDERWEIL ENGINEERS

718 ARCH ST
Philadelphia

VANDERWELL ENGINEERS

1216 ARCH ST
Philadelphia

VERNON SMOKEY STACK

311 1ST MONTGOMERY BLVD
Thorndale

VFL TECHNOLOGY CORP

16 HAGERTY BLVD
West Chester

VIBRA CON

42 WINDING HILL DR

VIDEOPTICS INC

1305 WELSH RD
Warrington

VIEW ENGINEERING

17 PRICE ST
Bala Cynwyd

VINCENT J BORRELLI INC

2800 INDUSTRIAL WAY

Vixen Hill Manufacturing Company

69E. Main St, BOX 389
Elverson

W J CASTLE & ASSOC

1345 ROUTE 38

W J CASTLE & ASSOC

1324 LOCUST ST
Philadelphia

W J MAC INTYRE INC

50 STERLING ST
Newtown

WANG ENGINEERING SVC

42 Washington Rd

WARDLE ENGINEERING CO

922 ROUTE 113
Sellersville

WASTEPRO ENGINEERING INC

820 WAVERLY RD
Kennett Square

WELSCH CO

134 MAPLE LEAF CT

WESTON SOLUTIONS INC

1400 WESTON WAY
West Chester

WESTON SOLUTIONS INC

1500 MARKET ST
Philadelphia

WESTON SOLUTIONS INC

300 DELAWARE AVE

WSG SOLUTIONS

160 COMMERCE DR
Aston

WYLE LABORATORIES INC

947 MEARNS RD
Warminster

YEE ENGINEERING

520 S Burnt Mill Rd

YERKES ASSOCIATES INC

1444 Phoenixville Pike
West Chester

YOUNG ENGINEERING INC

123 OLDBURY DR

ZEGER-ABRAMS INC

1112 CLARK RD
Glenside

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