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  1. CBEngi

    TJI - Bottom Cord Cracking - Repair?

    Hi RalphNater, I have a few thoughts comments: -I wouldn't believe just pushing the bottom chord member back in place and gluing/screwing would really bring the member back to its original strength. Their is a lot of shear flow cal's to run and generally I haven't been successful doing...
  2. CBEngi

    Pre-Engineered Timber Roof Trusses

    Hello, I am reviewing an existing roof structure for the installation of solar panels. I have the original design drawings from the pre-engineered timber roof truss designer. I have completed by own model of the truss system and have comparable results. Then I adjusted my model for the revised...
  3. CBEngi

    Shop Drawing Review Question

    I feel like this would have a lot to do with your contract and working relationship with the contractor. Generally, when I'm writing a proposal I like to say "one time shop drawing review". Normally I don't make an issue of reviewing shop drawings twice, but if its obvious the contractor is...
  4. CBEngi

    Calculation Efficiency

    Excel sheets will save you lots of time once they are developed. I would also recommend developing them yourself so you truly know how they work. Generally, I develop excel sheets for simple time consuming tasks, it might take a while the first time, but will save you greatly in the long run...
  5. CBEngi

    Switching from Private Sector to Public

    Hi JAE, I'm located in Canada and its indexed for inflation.
  6. CBEngi

    Switching from Private Sector to Public

    I currently work for a multi-disciplinary consulting company and primarily complete the structural design of industrial building, equipment supports and marine structures (I.e wharfs, breakwaters). I have been offered a Project Manager position with a public agency, with the department primary...
  7. CBEngi

    Tilt Up Panel Computations (Green Book Method)

    The Canadian "Concrete Design Handbook" does a pretty good job explaining the basics of tilt-up panel design.
  8. CBEngi

    Affordable Structural Analysis and Design Software

    I agree with KootK, with a previous employer we use RISA and I think its a great program. RISA is powerful and easy to learn and use. Now we use SFrame and Lusas with Lusas being pretty expensive. SFrame is simple and would likely be cost effective although I find it hard to navigate in when...
  9. CBEngi

    Hiring a Shop Drawing Reviewer

    Our structural engineering department has a "field guy" who checks most of the shop drawings and completes the site inspections. He has about 10 years of experience, when he started he did mostly drafting and still does drafting when not reviewing shop drawings or field inspections. Generally he...
  10. CBEngi

    Double weld on pole

    Generally speaking in "Style A" the welds are experiencing tension (caused by bending) and shear. the tension force is large because the moment arm causing tension/compression is small (basically the upper pipe dia.). In "Style B" the welds are in shear only. The bending is now taken as shear on...
  11. CBEngi

    6m Deep Basement

    With regards to waterproofing steel sheet pile wall it is pretty common practice in Atlantic Canada for large excavations. They use some type of gasket between the sheets as they are being driven. Most steel sheet pile suppliers also offer a buy back program where they will purchased the second...
  12. CBEngi

    Snow Melting System for a roof

    Weird I am located in Nova Scotia and the Nova Scotia Building code requires us to use NBCC 2015.
  13. CBEngi

    Snow Melting System for a roof

    National Building Code of Canada (NBCC) 2015. Clause 4.1.6.14 - Snow removal by mechanical, thermal, manual or other means shall not be used as a rationale to reduce snow loads. So if your in Canada its pretty clear.
  14. CBEngi

    Deflections in Steel Joists Under DeadLoad

    If your floor joists are simply supported and your slab is one way, I find it almost impossible to believe the deflection isn't maximum in the middle. Even with splice plates at the quarter points the slab can't deflect back up after the splice. Was the survey completed on the finished...
  15. CBEngi

    NBCC 2010 Commentary L

    Commentary L – Application of NBC Part 4 of Division B for the Structural Evaluation and Upgrading of Existing Buildings. I’m wondering how many other Structural Engineers use this section when looking at older buildings. It’s been bouncing around the office lately, with regards to what extend...
  16. CBEngi

    Tilt-Up PAnel Pour Strip Elimination

    If I understand correctly a "pour-Strip" is the area you leave out of the slab to allow for excavation down to the strip footing. You place the tilt-up panel directly on the strip footing and backfill. This creates your foundation wall and provides frost cover. I previously worked for a...
  17. CBEngi

    Tubular Steel Structures

    I have downloaded the attached document, thanks a lot. I also have the ASCE 10-15 standard. I have one final question,the contractor wishes to use ASTM A252 grade 3 pipe for the poles (it's locally available, Fy=310 mPa, Fu=455 mPa). This grade of material is not specifically mentioned in ASCE...
  18. CBEngi

    Tubular Steel Structures

    I have been tasked with designing a mono-pole structure. The base tube is approximately 1000 mm DIA. and 13 mm plate. I am wondering if anyone has any good references for the design. I have modeled the structure and feel confident with the loading. I’m looking for references on the capacity of...
  19. CBEngi

    Offshore Pipeline Dead Weight Meaning

    If you have a rock which weighs 5 pounds, the "dead weight" is 5 pounds. If you have a rock which weights 5 pounds with 2 pounds of snow on top, the "dead weight" of the rock is still 5 pounds. Dead weight or as its often refereed to as "deal load" or "self-weight" is simply the objects own...
  20. CBEngi

    Steel Lattice Tower Design Guides

    Quote "The corner post leg members are usually done as beam elements with the lacing members and redundant members as truss elements." Transmissiontowers, When you mention the above statement, does this mean that you generally neglect bending forces caused by wind/ice in your secondary...

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