Fastening Wood Joists to Steel Beam
Fastening Wood Joists to Steel Beam
(OP)
Can someone please comment on the following when installing wood joists:
1. placing wood joists on the bottom flange of a steel beam then "packing" the space between the joists with 2x8 or similar or,
2.fastening a wood member to the flange with bolts at 24" o.c. and fastening the joists to the wood member with joist hangers.
Thank you,
1. placing wood joists on the bottom flange of a steel beam then "packing" the space between the joists with 2x8 or similar or,
2.fastening a wood member to the flange with bolts at 24" o.c. and fastening the joists to the wood member with joist hangers.
Thank you,






RE: Fastening Wood Joists to Steel Beam
One is better than the other.
Choice number 1 isn't very good.
RE: Fastening Wood Joists to Steel Beam
I'd prefer #2, to provide the top flange nailer and use a top flange Simpson hanger.
RE: Fastening Wood Joists to Steel Beam
RE: Fastening Wood Joists to Steel Beam
Mike McCann
MMC Engineering
RE: Fastening Wood Joists to Steel Beam
1. fasten wood member to web, not flange.
RE: Fastening Wood Joists to Steel Beam
RE: Fastening Wood Joists to Steel Beam
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Fastening Wood Joists to Steel Beam
It is when the homeowners or architects don't want the beam hanging below their joists that you need to do something different. I prefer full depth joist hangers to top flange hangers any day.
RE: Fastening Wood Joists to Steel Beam
2. nerding, isn't a top flange hanger full depth anyway? they all loop around under the bottom of the joist.
RE: Fastening Wood Joists to Steel Beam
From what I understand, option 1. of placing the joists directly on the bottom flange should be rejected and have the contractor either attach a nailer to the web or top flange?
RE: Fastening Wood Joists to Steel Beam
Mike McCann
MMC Engineering
RE: Fastening Wood Joists to Steel Beam
RE: Fastening Wood Joists to Steel Beam
RE: Fastening Wood Joists to Steel Beam
Its called a buried beam.
Bolt 2x to web with bottom bearing on flange.
chamfer for radius.
Joist hanger to 2x./
Normally we use a double 2x if need to clear the top flange and the joist are flush to top of beam.
RE: Fastening Wood Joists to Steel Beam
Sorry for the belated response.
The reason that I use the 3X is not so much for the top bearing joist hangers, but mainly for the plywood diaphragm and any sill plate nailing. I just don't have to worry about the nail lengths with 3X's.
Mike McCann
MMC Engineering