Plywood Vertical Load Capacity 2

[SperlingPE]

Supports are at 12" o.c.
3/4" T&G, 5-ply, 5-layer plywood
Where can I find a load capacity for plywood.
If I put two layers down, does this double the load capacity?

 

[MiketheEngineer]

Maybe - what load can the supports hold. You say vertical load?? Is this like a floor or a wall??

Go see APAwood.org for more info

 

[woodman88]

Here are some of the span tables from APA.

Garth Dreger PE
AZ Phoenix area

 

[msquared48]

As MtE said, you will almost double the capacity of the plywood(due to the dead load reduction of the second sheet of plywood), but not necessarily the structural system supporting the vertical loads as you have to also check the supporting joists, beams, columns, any bearing studwalls, and footings.

Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask

 

[SperlingPE]

This is all new construction.
The supporting members and footings will be designed to support the load - whatever it is.

Owner is asking for at least 100 psf would like 150 psf live load.
I am shooting for whatever I can get with two layers of plywood.

Floor joists will be size & spaced accordingly.
Wall studs will match spacing of floor joists
Footing will be sized for the dead load and live load of what it is supporting

 

[MiketheEngineer]

Sounds reasonable at 150 psf - just double check at APAWood. Might want to glue and screw.

Also - make sure he is not running steel wheeled carts on this. Those will eat plywood - layer by layer.

 

[boo1]

Consider orientaing the long axis (8-foot dimension) perpendicular to the supports to achieve maximum stiffness, stagger joints, glue, joint bracing system, reduced joist spacing, reduce allowable joist defection and use solid blocking. Use a tight screw (or ring shank nail) pattern to reduce chance for squeaks. Follow end panel spacing requirements. 7/8" and 1" plywoods are available with custom orders. Attached is a teco plywood design guide,