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  1. nr123

    Corrugated arch concrete steel floor

    Anyone familiar with this type of floor? Or aware of any reference materials? I’ve done a lot of searching and have seen a few pictures but that’s about it. The building is early 1900s I’d say. The arched corrugated panels span about 4-6’ to what I surmise is a jr beam beam cast into the...
  2. nr123

    Wood shear wall question

    Wondering what others thoughts are on this one. I have a 15' tall x 15'-8" wide wood sheathed wall for a commercial building that has 2 large openings in the middle (door + window above) essentially leaving only 3'-10" wide legs on either side. The height exceeds 10' to address as a...
  3. nr123

    natatorium question (timber)

    Just wondering what others have used when it comes to timber for natatoriums. We are currently using inland red cedar timber decking on doug fir (or possibly alaskan yellow cedar) glulams. I have gotten conflicting information from timber suppliers. Biggest conflict is in regards to wood...
  4. nr123

    Swimming Pool Concrete Mix

    We are currently designing an indoor pool (3'to 6'-6' deep)and have been mulling around ideas with regards to the concrete mix. Currently the pool is proposed to be shotcreted and have 8" thick walls with integral foundations and 6" slab. We are considering a 4000 psi mix with a W/C of 0.45...
  5. nr123

    large second floor diaphragm opening

    I have a two story building that will be located on the west coast of California so the diaphragm loads are fairly high (upwards of 500 kips). The building is steel frame with SCBF to resist the main lateral forces. The second floor which is 3" NWC + 1" form deck on steel joists and has two...
  6. nr123

    ASCE 7-05 Increasing Factors (overstrength, redundancy)

    I have been going through the ASCE 7-05 as I am starting to get into higher seismic areas. I think I have a grasp as to when the redundancy factor would be greater than 1.0 however I am somewhat confused as to when the overstrangth factor comes into play. I know that you would apply the...
  7. nr123

    Metal Roof Deck in Compression

    Has anyone ever considered metal deck in compression. I am looking at section 1620.3.1 (IBC 03) which deals with anchorage to concrete or masonry walls. Would like to justify that in the strong direction of 1 1/2" metal roof deck that the loading imposed by Eq. 16-62 could be taken in...

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