structural design: sizing floor joists?
Q. given D=0.5m max, spacing = 0.30m O.C., and LL=4.79 kN/sq.m. How can i size the floor joist using open web steel floor joists composed of 2 angle bars for the top and bottom chords and round bars for the webs? a tip on how to look/use the AISC steel table will also greatly help me. =p thanks.
Asked by binibiningarki06 - Tue Mar 24 01:19:32 2009 - - 1 Answers - 0 Comments

A. bini: The AISC does not address open web steel joist design. Instead, refer to the Steel Joist Institute's "Catalog of Standard Specifications and Load Table for Steel Joists and Joist Girders. " See the first link below for a web page from which you can register to download this catalog. The second link is to an article from Modern Steel Construction magazine that discusses steel joist design and use of joist selection tables in the aforementioned catalog.
Answered by Mike - Thu Mar 26 21:40:58 2009

Beam Size? Steel?
Q. Can anyone help me out? I am wanting to take out a load bearing wall in a small bunglow (30x24) in advance of adding a second storey next summer. I want to support the existing ceiling joists running from front to back (12' each side overlapping in the middle) for a clear span of 15'. I was going to support the beam ends with three or four 2x6's running down thru the floor directly onto the main beam supporting the first floor (really beefy old school stuff). I need to find out what size the beam should be to support new second storey bedrooms and new roof (and whatever snow sits on it!) and clear that 15' span. I'm thinking it will be best to use steel to maximize head room passing under it in what will be a living room area? Any… [cont.]
Asked by bfi_ottawa - Wed Nov 29 12:53:42 2006 - - 2 Answers - 0 Comments

A. I would recommend contacting an engineer to do this. It would be worth the 300 bucks to know that you are doing it right.
Answered by daedgewood - Wed Nov 29 19:02:41 2006

what weight will a 12mm steel bolt hold?
Q. 2 bolts either side of 8mm angle iron to hold a roof spanning about 14 ft x 8ft with 6x4 wooden joists
Asked by johnrozblat - Wed Apr 11 13:41:33 2007 - - 6 Answers - 0 Comments

A. Get the specs on the bolt. The proof load will tell you how much the bolt should carry. All the calculations and testing to determine the bolt capacity have been done, so use the data available. Two bolts sounds little light on though.
Answered by Roger S - Wed Apr 11 18:42:46 2007