Ok I’m relatively new to the hip roof blueprints so how would I measure the square footage of a hip roof from a set of architectural drawings?
How to measure a hip roof from blueprints
Jboogy66
1 - 20 of 24 Posts
The scaling number is the run. Use the multiplier to find the length of the rafter which would be the triangle height.
Gives you the height of the triangle for the calculation you need for the hip. Base is scaled from fascia to fascia. Do the math and you have the square footage.
Joined
·
13,681 Posts
Take it to your roofing supplier and let them do it.
How are you a roofer and you don’t know how to do a roof takeoff?
How are you a roofer and you don’t know how to do a roof takeoff?
He said that he was new to doing this from plans.
He also said that he was in a hurry for the free advice...good luck to him on that score.
Andy.
Joined
·
1,680 Posts
My thoughts also. This is pretty basic math.
If you are estimating / quoting a job, you stand to get yourself in some serious financial trouble if you can't get through a simple roof square footage take-off. Get some mathematics help from a private tutor or your local community college.
Don't be so thinned skinned man, it's not that big of a deal.
As was said before. looking at the triangle that the roof plane looks like on the plans, you multiply the base (the long part of the triangle) by the height of the triangle (the peak of the triangle down to the base) then divide that in half.
Then take that last number and multiply it by the number in the "FACTOR" category that Jlhaslip posted and bam! you have the total sq. footage of the roof.
For example, let's say the plans show a 5 in 12 roof pitch and you scale the roof plane at say 22' long (the base) and 13' high (the height). you can go like this 1/2 x 22' = 11' cool?, then 11' x 13' (the height) = 143 sq. ft.
Then take the 143 sq. feet and multiply that by the 5:12 pitch FACTOR (=1.085) so you have 143 sq. ft. x 1.085 = 155 sq. ft. of roofing surface.
Are we groovy now?
Andy.
As was said before. looking at the triangle that the roof plane looks like on the plans, you multiply the base (the long part of the triangle) by the height of the triangle (the peak of the triangle down to the base) then divide that in half.
Then take that last number and multiply it by the number in the "FACTOR" category that Jlhaslip posted and bam! you have the total sq. footage of the roof.
For example, let's say the plans show a 5 in 12 roof pitch and you scale the roof plane at say 22' long (the base) and 13' high (the height). you can go like this 1/2 x 22' = 11' cool?, then 11' x 13' (the height) = 143 sq. ft.
Then take the 143 sq. feet and multiply that by the 5:12 pitch FACTOR (=1.085) so you have 143 sq. ft. x 1.085 = 155 sq. ft. of roofing surface.
Are we groovy now?
Andy.
Joined
·
13,681 Posts
You need to learn how to do the math for the slope. I can read a roof slope by looking at it but........
GAF made a plastic business card that had some cut corners on it. If you couldnt read a roof pitch by looks.....You would hold the card up to the gable and keep rotating the card till the angle matched. Under the angle was the correct pitch and per ft value.
A handy thing if you can find it
GAF made a plastic business card that had some cut corners on it. If you couldnt read a roof pitch by looks.....You would hold the card up to the gable and keep rotating the card till the angle matched. Under the angle was the correct pitch and per ft value.
A handy thing if you can find it
1 - 20 of 24 Posts
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
