Look at Table I in the PDF from this link:
http://structuremag.org/Archives/2009-6/C-EngrNotebook-Antiquated9a-Stuart-June-09.pdf
…tell me which Macomber joist you think you have and I should have load tables I can send you.
D. Matthew Stuart, P.E., S.E., F.ASCE, SECB
Structural Division Manager
Pennoni Associates Inc.
One Drexel Plaza
3001 Market Street, 2nd Floor
Philadelphia, PA 19104
Office 215-222-3000 x7895 | Direct 215-254-7895
Fax 215-222-0789 | Mobile 908-309-8657
http://www.pennoni.com | mstuart@pennoni.com
From: Andy Heigley [mailto:aheigley@jgaeng.com]
Sent: Wednesday, August 24, 2011 3:10 PM
To: SEAINT
Subject: Macomber joists (1950's)
Anyone out there have an old Macomber Joist catalog around 1950’s? I have some 60’s and 70’s era ones, but yesterday I ran into some Macomber joists that have a typical V section top, but the bottom chord is double rods, in lieu of another V section. I’m thinking it might be first generation of their cold formed section b/c I know before that they used to make a joist purlin that had double rods for the top and bottom chords. Haven’t seen one of these yet, but the joist tag does confirm they are Macomber’s.
Just trying to make my life easier and seeing if anyone has one anywhere…
Thanks in advance,
Andy
Andrew Heigley, PE