Questions tagged [lumber]

For questions involving the use of lumber as a construction material.

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22
votes
3answers
12k views

Why are 2“x4”'s really 1.5“x3.5”?

Just curious as to the reasoning, is it a spec, or is it simply 'backwards compatibility'?
14
votes
7answers
41k views

What are framing dimensions like in the metric world?

I was always curious about this. In the states we have: Lumber - Comes most commonly in 2 inch (2x4,6,8,10,12,16) and 4 inch (4x4,4x6) varieties. Plywood - Almost always 4x8 feet Drywall/...
0
votes
1answer
2k views

Beam size and material for 15 feet long swing

I need to create a 15 feet span beam for kid swing (300 lbs load / 150 lbs and 2 swings assumption). One end will bolt to the tree (just for convenience). What "treated lumber" lumber size and ...
6
votes
5answers
18k views

Can I use the area above my garage for storage?

The ceiling joists in my garage are 2x8 spaced 24" o.c., and span 21'. The roof load appears to be carried by the walls, so the joists seem to only be in place to hold the drywall. I'd like to use ...
3
votes
1answer
32k views

Is 90mm x 45mm a metric 4x2?

This is similar to this question about metric measurements. In Australia, a common measurement is 90mm x 45mm for timber. A 4x2 would be (approx) 100mm x 50mm but, as I understand it, that is the ...
1
vote
2answers
721 views

Why are my joists smaller than standard size?

I was preparing to replace a cantilevered rim joist on my house today. I bought a 2x10 treated board to replace it. I cut a piece to use as blocking and found that the board was much wider than the ...
0
votes
4answers
15k views

how to carry 20ft lumbers to home

I need to carry one 20 ft lumber from HomeDepot to my home. I don't have a truck but have a minivan (Odyssey). The minivan does not have a roof rack though. A friend of mine suggested that I could ...