T&G Decking

[vandede427]

Can't find any diaphragm shear values.

 

[frv]

Look at p. 19 of SDPWS of the NDS..

For horizontal lumber sheathing, values are really low..

 

[vandede427]

thanks!

looks like diagonal decking is 6x better than horizontal decking.

now, AITC has allowable roof spans based on simple lay-up and controlled random lay-up for horiztonal pattern. for diagonal allowable spans, do you think it would be as simple as applying a 1.414 factor?

i.e. let's say a particular decking is good for 40 psf over 96" joist spacing with horizontal lay-up. to go diagonal and keep 40 psf you'd have to decrease joist spacing to 67" (96/1.414), or to keep 96" joist spacing the decking would only be good for 28 psf (40/1.414).

also, can controlled random lay-up even be used on a 45 degree?

 

[JAE]

Look at these too:

thread507-106592
thread337-254770
thread507-106592