Creating a floor diaphragm chord at balloon framing
Creating a floor diaphragm chord at balloon framing
(OP)
I am working on an apartment building (2 story home turned into 4 apts) and the second floor framing abuts & attaches to balloon framed studs. The floor diaphragm consists of 2x10 @ 16"oc and 1x T&G fir decking. Along the wall with joists parallel its easy enough to simply strap the joist breaks but at walls perpendicular I have not got a good idea how to create a chord. What I have done in the past is simply blocking and a coil strap. Anyone got any other ideas. Oh, and besides the lack of the chord, any ideas about a safe number to use for allowable diaphragm shears? For this kind of assembly I have been using 100 plf.






RE: Creating a floor diaphragm chord at balloon framing
I would detail the connection, whatever it is, to meet the IRC/IBC requirements for whatever horizontal shear and chord force you need, using horizontal blocking in the wall, a 2X ledger, and appropriate nailing and strapping.
The ledger, if strapped at any splices, could be made into your chord member with no problem.
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Creating a floor diaphragm chord at balloon framing
RE: Creating a floor diaphragm chord at balloon framing
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Creating a floor diaphragm chord at balloon framing