Maximum Lengths for Sawn Lumber
Maximum Lengths for Sawn Lumber
(OP)
Is there any good sources out there for the maximum available lengths for sawn lumber? Such as, if I use 2x12 rafters, how long can I get them before I have to go special order or it becomes not available?






RE: Maximum Lengths for Sawn Lumber
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The American Lumber Standards Committee does not address length, other than specifying 2' increments. Here is the "American Softwood Lumber Standard"
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www.SlideRuleEra.net
RE: Maximum Lengths for Sawn Lumber
RE: Maximum Lengths for Sawn Lumber
Another thing to consider is how straight will a 22' length piece of lumber be?
Consider TJI's?
RE: Maximum Lengths for Sawn Lumber
RE: Maximum Lengths for Sawn Lumber
RE: Maximum Lengths for Sawn Lumber
DaveAtkins
RE: Maximum Lengths for Sawn Lumber
Regarding the long rafters, consider scissor trusses maybe or other type products. Maybe glulam ($$$).
RE: Maximum Lengths for Sawn Lumber
RE: Maximum Lengths for Sawn Lumber
Dik
RE: Maximum Lengths for Sawn Lumber
Of course the school was built in 1920s.
By the way, anyone has published date on Miami-Dade pine?
Regards,
Lutfi
RE: Maximum Lengths for Sawn Lumber
As a designer, I would be concern about the deflection of a memeber 22 ft long but looking at SPF span charts.
http://www.southernpine.com/pdf/table02.pdf
With a 40 LL 10 DL Loading L/360
A 2X12 #2 @ 12" o/c is good for 21'-9" CLEAR!!! My have to require a #1 but not a uncommon requirement