Heavy Timber Decking
Heavy Timber Decking
(OP)
I'm looking for allowable unit shear values (for diaphragms)for 3" and 4" tongue & groove decking supported on beams spaced at 6' o.c. There is no plywood topping. Any references would be helpful. Thanks.





RE: Heavy Timber Decking
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RE: Heavy Timber Decking
First off do a search for timber decking. Recently someone asked about developing diaphragm action by gluing the tongue and groove.
Basically the shear values a very low unless the deck is applied diagonaly. Your main option is to use glue or to apply a plywood topping. In many case the plywood will be more economical.
For more information contact Western Wood Products Association or American Institute of Timber Construction. You could also contact a decking manufacturer, such as Filler King or Disdero.
RE: Heavy Timber Decking
http://www.awc.org/pdf/wcd4.pdf
RE: Heavy Timber Decking
http://www.awc.org/pdf/wcd2.pdf
RE: Heavy Timber Decking
The problem here is, that it is simply a brochure from a company that sells decking, and doesn't include any ICBO or ICC validation.
RE: Heavy Timber Decking
In the past Potlatch published IBCO Research Report No. 1379 covering a glued diaphragm using 3" decking. It is my understanding that Report No. 1379 was not renewed because the glue specified in the report is no longer used..
The Potlatch system was based on the use of 3M 5230 which 3M no longer manufactures. There are some people who are still using the system by subsituting other glues for 5230.
In the past Potlatch sold their decking line to Disdero.
Disdero or another decking manufacturer could be contacted for additional information.