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  1. jonathanwilkins

    Adjusted Shear Value - NDS

    I have to calculate a beam that has been notched on the tension face more than the building code allows. I'm reading the NDS and I think I'm on the right track but would like a little help. Section 3.4.3 talks about shear design and goes into evaluating notches. They use a term..."adjusted...
  2. jonathanwilkins

    Monolithic footing question

    Working on a small town house project...30' deep. Typical IRC allows a 16" wide monolithic footer. We're in high wind so we're supposed to [prescriptively] go to 24". We're going to build a bunch of these and want to use 16" footers to save concrete so I'm trying to design them. Everything...
  3. jonathanwilkins

    fan static pressure

    I've got an "out of the box" situation. We're building a building where there will be fire tests conducted. The fire marshall has requested that an engineer spec the exhaust hood. That will be me. I talked to him because there's really no code requirement for what we're doing. We came to a...
  4. jonathanwilkins

    Built-up Beam ply-ply connection

    I've got an LVL (3-ply) supporting a large concentrated load...12,000# hanging into the side. The hanger will be a simpson hanger so no issues with that. I need to figure out the best way to connect the plies together of the supporting beam. Don't think the typical connection is sufficient...
  5. jonathanwilkins

    Steel Column Base Plate

    I'm specifying a steel column & baseplate to bear on a thickened slab. Loads are light ~5k or so. Am I correct in that 4 bolts are required to anchor the baseplate? (Column supports gravity & uplift). Contractor doesn't want to put a large plate + 4 bolts. I feel certain I've read 4 bolts...
  6. jonathanwilkins

    Pre-engineered metal building slab

    In my area (southeast), metal building foundations are typically monolithic pours with large footers at the columns and hairpins to handle the thrust. Control joints are typically placed at 10-12' o.c. to prevent cracking. This is typically not overly detailed and from a purely technical...
  7. jonathanwilkins

    Masonry Wall Design

    Looking at designing a load bearing, masonry wall in a high wind area. Wind Load is 37psf, wall is 17' tall. For the sake of simplicity for my question, I'm treating the roof load as negligible and only using wind loads. Going through the TEK manual, I get a #5 @ 24" o.c. from the allowable...
  8. jonathanwilkins

    Groove or Fillet

    I'm designing a bracket to tie to LVLs together (really low reaction <1000lbs). The bracket will be 2 1/4" steel plates w/ bolt holes & welded together to make a 135* angle. I rarely specify welds so need a little advise...groove or fillet?
  9. jonathanwilkins

    Double Wythe Brick Wall

    I've got a customer who wants to build the bottom of his garage out of a cavity wall (2 bricks). Gives a "look" he's trying to achieve. Brick on the outside and the same brick on the inside. The wall will sit directly on a footing, be approximately 48" tall and support the floor above and the...
  10. jonathanwilkins

    rotten studs

    I'm working on a building that's got some water intrusion problems. So far it's only a little plywood at the corners but I've got to go check out a section where the studs are rotten. I'm guessing that I'm going to find the vapor barrier is on the inside of the studs. The building is in a...
  11. jonathanwilkins

    roof rafters - no ceiling

    I'm working on a framing plan for a customer - the house has a very large 12/12 pitch roof and much of the 2nd floor is located inside of it. The living room of the house, on the plans, shows a vault from the exterior walls going flat at the same height as the 2nd floor ceiling. The longest...
  12. jonathanwilkins

    Fire Questions

    I'm doing the structural plan for an apartment building...2 stories, wood-framed. I'm trying to figure out the roof framing and if/where draft-stopping is required. The units will be sprinkled and fire-rated. Code is 2009 NC Building Code (IBC 2006 w/ revisions). 708.4 talks about...
  13. jonathanwilkins

    Brick Lintel

    I have a customer who wants to reinforce the brick above a garage door header with 3/16" wire as opposed to a big steel lintel or tying a regular lintel to the garage door header. It's a 16' door w/ approx 30" of brick above it. He's been doing this forever (as long as I've been alive if not...
  14. jonathanwilkins

    2006 IBC Special Inspections (CH 17)

    I typically do residential work so I'm not too familiar with the permit rules for commercial projects. I'm getting ready to be the EOR on a public bathroom. The building will be on wood piles in a high wind zone. (a very basic rectangular building). 1704.1.2 requires special inspections...
  15. jonathanwilkins

    Quality Assurance Program

    I do a little work on the side putting together plans for residential construction. Seeing, though, that residential construction has all but ceased, I'm looking at doing a small commercial building. The building code requires that a quality assurance plan be written for this building (high...
  16. jonathanwilkins

    Cost Question

    We're designing a tower that's cost sensitive. It's 13'X13' & has a radius roof on it, curved one way. Would steel or glulams (both curved) be less expensive? Thanks.
  17. jonathanwilkins

    wood shear wall

    When designing shear walls in beach houses, the ocean side is almost always full of windows & doors. Making the numbers work is not too big of a problem, I'm worried, though, that when there's no panels meeting the IBCs 3.5-1 height to width ratio, that the panel will not be able to develop the...

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