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Old H Series Bar Joists

Old H Series Bar Joists

Old H Series Bar Joists

I have an old H series joist that I need some numbers on.  The Bethlehem Old Joist tables that are downloadable do not go up to the joist I have.
I have a Macomber V-Beam 26H.  Serial No. is C 67156E.
The tables in Bethlehem only go to 24H series.
Anyone have load tables for Macomber 26H's or even 26H's in general?

RE: Old H Series Bar Joists

pylko....You could check with SJI for their old joist tables but I don't think that the Macomber is SJI.  If I remember right, some years ago I was asked to check a roof joist system for capacity and had a heck of a time finding data on Macomber joists.  I believe that they use some weird type of top chord (not a double angle but some kind of bent wing plate) and they went out of business many years ago.  I finally found some info from another engineer somewhere and got copies of old load tables.

I know the above isn't much help...I've even mis-placed the load tables that I received.  

RE: Old H Series Bar Joists

YES!  This is the third run-in I've had with Macomber.  You'd think by now I'd have the info, eh?  NOT!
YOu are 100% correct about the top and bottom chords.  Like a heavy gage plate bent in a sort of W shape.

RE: Old H Series Bar Joists

I did a Google search and came up with a 2001 thread in the Structural Engineers Association International archive about Macomber joists.  A number of engineers stated that they had old tables from the 1960's (H-series era) from Macomber.  Here are some links (you can follow the threads for others):




Perhaps if you contact these engineers they can help you out.

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