Rafters are usually on 2 ft. centers.
A nominal 2x6 baord is actually 5.5" wide. 5.5"/12"=0.45833ft => 0.45833ft x 300ft = 137.5 sq-ft
4x3?
Well, it could be any 2+ sided shapes. A square (4x5), a rectangle (2x6 then 2x4 perhaps?), or any other shape.
3 or 6, depending on whether rectangles rotated through 90 degrees are counted as different. The rectangles are 1x12, 2x6 3x4 and their rotated versions: 4x3, 6x2 and 12x1.
Over a century and a half ago, wood was milled a true 2" x 4" ....thus 2x4 .....the same with 2x6, 2x8 ....and so on. However it was "rough sawn" lumber. Wood size standards came about in the 1920 's or so. still made chnges in the mid 60's But the need for more finished lumber drove sawmills to go through another step in the milling process.. saw mills were crude and milled in crude dimentions. if the mill surfaced one side it was S1S......Surfaced ! Side.... S2S ..and so one. Economics was the real player in all this ...The new surfaced sizes became the standard...
12
Evation: n+7-(2x6) Answer: 0
There are several ways, but probably the easiest way would be to temporarily buck under the afflicted ceiling joist with a 2x6 temporarily, until the joist is in line with the others. Then go into the attic and cut and attach a 2x6 to the joist and vertically to the roof ridge. Remove the buck. The joist should stay in place.
4x9+2x6 49,206
2x6
I am going to guess that you are talking about the fascia board which is usually a 2x6 board
The factors that are involved are the span you are covering, the type of roof and the pitch of it. How you are bracing the rafters. Wider the span, wider the joist. 2x6 is usually enough for most house construction.
It is equal to to 72 because 2x6=12 and 3x2=6 and 12x6=72 or if you think this is to complicated, you can do 2x6=12, 12x3=36, and then 36x2, which then also gives you 72
Incomplete information. Need to know several factors.... Residential, or Commercial, Basement or main floors, type of roof design etc, etc, etc...
An expression. It can be factored out slightly too: 2x6 + 5x3 - 7x4 = x3(2x3 - 7x + 5)
You cut rafters, brace them as needed depending on the span and shingle it. I put one on a friend of mines. I cut the outside ends of the rafters at an angle so that I didn't need to change the fascia. Lay a 2x6 flat on the existing roof to run the braces down to. Your roof may not be flat but have a slope one way on it so you will have to take that into consideration for the peaked roof. He had a slightly sloped roof with tar and gravel on it and at the time I was able to put a pitched roof on for less than they wanted to re tar the flat one.
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