Parallel Strand Lumber (PSL)

[ajk1]

How can I find the permissible stresses for parallel strand lumber for specific manufacturers? The Canadian Wood Design Manual lists approximate stresses but also says to check with the specific manufacturer. I am interested in manufacturers in the southern Ontario region (Toronto). A Bing search does not come up with anything on parallel strand lumber.

 

[structSU10]

Weyerhauser has what they call parallam PSL's, but I don't see canada specific info on those - only their floor joist really.

 

[CANPRO]

Bing search? That could be the problem...try a google search.

Best bet is to probably contact the manufacturer directly. I've searched for this before and I usually end up using the allowable bending moment and shear provided. Weyerhaeuser has these values on their website, I'm sure others do as well.

 

[ajk1]

structSU10 and CANEIT; Thanks you for this information. Yes I would like to use Google, but seem to not be able to get to Google...I think Microsoft has arranged things so can't get there by the normal procedures!

 

[wadavis]

This links to the weyerhauser specifier guide, design stresses and loads can be found within.
woodbywy.com/document/tj-9000/

If you dig on their web site enough or get to right person on the phone, most engineered lumber manufactures will have design guides for their products.

 

[focuseng]

I was under the impression that PSL is a proprietary patented material technology which Weyerhauser is the exclusive manufacturer. They call it "Parallam". see

http://www.ilevel.com.

LVL is a different story however.

______________
MAP

 

[dhengr]

Ajk1:
The allowable stresses and mechanical properties of these manufactured wood products are very much dependant upon the wood species a manufacturer uses, their manufacturing process and the adhesives used. So, you have to get their design literature and then spec. a specific product or equal or better. Check your local lumber yards and suppliers to determine availability in your area.