are two 4x4 equal to 4x8
are two 4x4 equal to 4x8
(OP)
If two 4x4 posts are joined by bolt/4ft and strong adhesive will the resulting 4x8 compare with a 4x8 one piece?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: are two 4x4 equal to 4x8
The two 4X4's give a section of 3.5 X 7, where the 4X8 is 3.5 X 7.25, slightly larger.
Mike McCann
MMC Engineering
RE: are two 4x4 equal to 4x8
RE: are two 4x4 equal to 4x8
Dik
RE: are two 4x4 equal to 4x8
I often use something like 75% of full value??!!
RE: are two 4x4 equal to 4x8
RE: are two 4x4 equal to 4x8
However, the NDS, in section 15.3, has a Kf factor that applies to the column stability factor Cp which reduces the column capacity (in some cases 0.6 per StructuralEIT above).
If your column is free-standing then this factor applies.
If you column is within a wall, where sheathing is present to eliminate any bending that would cause horizontal slip shear in the plane between the two 4x4's, then the Kf factor can be ignored.
RE: are two 4x4 equal to 4x8
What if he/she wants it as a 4x8 beam?
If that is the case, you could perhaps do it, but I'd be worried about the glue/bolt scenario being able to withstand the 3V/2A for an extended (if any) period. GluLam beams can do it, but that is at a controlled manufacturing facility and the materials and glue have been tested.
RE: are two 4x4 equal to 4x8
RE: are two 4x4 equal to 4x8
Try to talk them into either an LVL or you could do a flitch plate beam out of rough sawn lumber.
I've had this in my library for a while:
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