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  • Users: manstrom
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  1. manstrom

    ACI 319-19 One way shear provisions for walls and slabs

    There have been a few posts on this, but I don't think this has been properly addressed by the ACI. In the ACI 318-19, there is a new table for calculating one way shear. Table 22.5.5.1 shows three formulas. Formula (a) and (b) simplify to the familiar equation phi*2*sqrt(f'c)*b*d times...
  2. manstrom

    ASCE 7-22 Snow load revisions. Big load increases.

    I haven't spent much time with ASCE 7-22 yet. I was just made aware that the snow loads provisions are changing from a allowable measurement to an ultimate measurement. Similar to wind load revisions in previous ASCE-7 editions. Load combination factors are changing: The ASD factor is now...
  3. manstrom

    ACI 318 15.4. I'm at a loss in interpreting this.

    For a two way flat slab on columns... I am banging my head against the wall trying to understand the requirements here. I've been looking at this for hours and I'm going nuts. This is new to the ACI 318-14 as far as I can tell. In the past, shear reinforcing was not required at columns as...
  4. manstrom

    Composite Steel Deck - Stud layout for "full" design value

    It's been a while. I came across a (dumb) question that I don't know 100% know the answer. In composite steel deck tables, values are given for a deck with no steel studs and a deck with 1 stud per foot. The values with studs are obviously higher. In order to meet the "1 stud per foot"...
  5. manstrom

    Another existing Bar joist question - 16J6 from 1966

    The existing warehouse drawings from 1966 tell me it was a 16J6. I want to verify the capacity from the SJI manual of the time. I have a 1972 SJI manual which tells me 275TL and 224LL at 25'. Does anyone have an older one that would tell me 1966 info? When I am working on a problem, I...
  6. manstrom

    Wind loading on building with courtyard

    Let's say I have a 5-story building, 200'x200' in plan with a courtyard in the middle. The courtyard is 80'x80' and extends the full 5 stories and is open on top. The building is 60' deep on all sides. Basically a fat "tube" of a building. How would wind pressures be applied the building? I...
  7. manstrom

    Need to locate SSTD 10-93 code

    This is for a project in Ocean City, MD. I don't know why they reference a 22 year old code. I can't find it anywhere. ebay, amazon, icc, ansi, nothing. Does anyone have a link? The full name is "Standard for Hurricane Resistant Residential Construction" When I am working on a problem, I...
  8. manstrom

    Best / Easiest Structural Steel Design Software for big slabs

    I have used Ram Steel recently and I am not fond of it. The projects that I am working on recently are large steel transfer slabs supporting wood construction. They have a variety of line loads, point loads, etc. One problem that I am having is that the loads need to be assigned a name...
  9. manstrom

    Fireproofing and Special Inspections

    Is it the Structural Engineer's responsibility to review and approve spray fireproofing reports? A building official insists that it is. This is news to me. I didn't specify it. I didn't review the submittal. There is a 3rd party inspector that inspects it and provides a report. In my...
  10. manstrom

    AASHTO vehicle impact on retaining wall

    I have a retaining wall along side a road where the county has requested a design for a vehicle impact. I know IBC and ASCE much better than AASHTO. If this was an IBC load, it would be a 6k load at 1'-6" or 2'-3" depending on the year. But this is a public road. I'm not familiar with the...
  11. manstrom

    Large Steel Podium - What Lateral Force Resisting System?

    I've spent the day trying to put together a lateral system for a large (400'x250') L-shaped steel podium. The podium is a composite steel system supporting 5 stories of wood residential. The structure is open on all sides, so I have been using a series of X-braces throughout the building. The...
  12. manstrom

    Balcony Loads - IBC 2012 vs. ASCE 7-10

    IBC 2012 states "Balconies and Decks - Same as occupancy served". e.g. 40 psf for an apartment balcony ASCE 7-10 states "1.5 times the live load for the occupancy served. Not required to exceed 100 psf" e.g. 60 psf for an apartment balcony Has anyone come across this before? Which one should...
  13. manstrom

    Spanning slabs over backfill

    Long time lurker, first time poster I have been in the residential construction field for over 10 years, I am a Structural P.E. and routinely I question some of the things that I have held as fact. Where I have a large foundation step in a building - say a garage next to a basement in a single...

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