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  • Users: Zoobie777
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  1. Zoobie777

    Cantilevered Beam on Wall

    Hey, I come across the situation often enough and I want to know if I'm designing things right or if I am cheating. I use iStruct but I imagine other software is similar. When I put a beam in line with a wall with a cantilever I can only get the beam to pass if there are two bearings. I get...
  2. Zoobie777

    Blocking to counteract moment of beam.

    Hi, I have a situation where a beam is failing due to excess moment. This beam is 18" deep (LVL) and is running parallel to 11-7/8" deep I-joists (top of beam and top of joists are flush). The beam is supporting is a single column at approx. mid-span taking a very large point load from the...
  3. Zoobie777

    Ridge Beam Moment

    Hi, I am designing an LVL ridge beam and its failing on moment. Do the rafters (hung on each side of beam) count as top bracing? I wanna say yes but would like an expert to weigh in. Thanks!
  4. Zoobie777

    High Snow Load on Deck

    Hi, Found some old threads in a similar vein but none really answered my question. First of all this is in Canada so NBCC2020 applies. The deck is up at a ski hill and the snow load is 90+psf (GSL=160+). The occupancy live load is 40 psf. Can I ignore the 40 psf as the snow load is...
  5. Zoobie777

    Cantilevered Floor Truss Backspan

    I'm designing a floor truss system that has a short cantilever (1'6") that is perpendicular to the trusses. Generally I follow the 150% rule of thumb which would give a 4'6" back span, which will end up being 5'4" to keep the 16"oc truss spacing nice and neat. The question I have is, can you...
  6. Zoobie777

    Minimum Header Requirements in The Great White North

    A bit of background to my question: I have seen on house plans (architectural and structural) minimum header requirements of 2-ply 2x10 for <6' span and 3-ply 2x10 for >6' span or some similar variation. I have also had people tell me that these are code requirements (BCBC 2024, etc.). When I...
  7. Zoobie777

    King Studs, Jack Studs, and the NBCC

    I have some questions about king and jack (trimmer) studs. Some of its generic but also pertains to 9.23.10.6 of the NBCC (National Building Code of Canada). I size headers/lintels primarily using iStruct taking into account loads from floors, roofs, decks, girders...everything. Based on...
  8. Zoobie777

    Load bearing capacity of a 40' seacan

    I have designed several roof truss systems for garages/storage buildings constructed with seacans as the 'walls'. They are increasingly popular, especially with homesteaders. Most of the time the trusses bear on the walls with a sill plates running up the 40' (or 20') sides. We have a...
  9. Zoobie777

    Identifying column marks on engineered drawing

    I'm working on a floor and roof design for a 6-plex. The structural drawings are well laid out and there are good schedules for all the wooden beams,columns,joists,etc. However, there are a bunch of columns that are identified as either SC, S2C, S3C, 2S2C, or 2S3C. I am presuming these are...
  10. Zoobie777

    Simpson Strong-Tie Hanger Wood Species Question

    Hi, When selecting hangers does the wood species for factored resistance apply to just what the hanger is attached to or does it include what is hung? For example, if I have a D.Fir girder and I want to hang an SPF truss on it, do I used the factored resistance for D.Fir or SPF? Thanks in...
  11. Zoobie777

    Point load on a joist

    Trying to determine the point load at the end of a cantilevered joist. I'm a chemical engineer so please forgive me. The wall above has a dead load of 80 plf and a snow load of 110 plf. If my joists are at 16" o/c is my point load 1.333 ft*190/2=127 lbs? If not please help. I know its a...

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