Sheeting gable ends help measureing

[blair683]

I am currently building a 30' by 27' pole building. I am to the point of sheeting my gable ends with 1/2" OSB. I already did the walls. I am stumped as to how to measure the angles of the gable to cut the OSB. Is there a trick to quickly and accurately measure the gable angles? My pitch is 4:12 if that helps. I know I should have sheeted them before I put the trusses up, but I didn't. Thanks for any help.

 

[BigEd]

Go here:

http://www.mathportal.org/calculators/plane-geometry-calculators/right-triangle-calculator.php

 

[pshking]

Maybe i'm under thinking what you are asking, but if you using 4x8 sheets of OSB, when sheeting up to the peak, once you know the measure of the lower side, mark that off on the sheet then go the other side of the sheet and add 16 inches and snap a chalk line. You can always use the cut-off as a angle template for the next cuts. then do the opposite from the peak back down to the eave. Keep in mind that sheet up to the peak will usually have to be cut on two pitch angles unless that is where you start and work down on both sides.

It would be harder to mark of the angles at about 18.4ish degs...

 

[Jeepster04]

Do you have a speed square? I was able to use that when I was cutting metal for the gable ends.

Or like pshking said, 4/12 means you will travel 4" up over the course of a foot. So if youre using the 4' end it will be 16" and if youre using the 8' end it will be 32".....

 

[Kaizen]

my peak was higher but you can do something like this. I started at the middle and drew some marks on the center stud which in theory should be identical on both sides. I stood a piece of ply up to this line and nailed it home. then on the right side I measured from top to bottom.......moved over 4 feet and another measure. took those two and put on ply with a chalkline and sawed off.
I tried being the pro with my square and it was off by 2 inches at one end so I just did it piecemeal. you might want to lay your sheets the long way to get the most full sheet coverage.

 

[Marctrees]

Why not just measure up on the left stud, then the one 4' over, transfer the measurements to your full sheet and draw/snap a cutling line ?

No fancy math needed, just 2 diff heights on left and right edges of sheet.

Works for me. Marc

 

[Marctrees]

Or let the gable sheets run above the rafters, sawzall or circ saw waste? Marc

 

[blair683]

Thanks for the ideas guys. I can't do the overhang the rafters and cut off the excess. I already have a shingled roof on with one foot overhang on the gables.

 

[Marctrees]

Then option post #6.

Will that work for you?

Cut it a 1/4" short so you don't have to fight it in. Marc

 

[blair683]

I was hoping to run the OSB horizontal since I have a 30' span. I may try to measure the short end then add 32" for the other end and snap a line like suggested here.

 

[Marctrees]

Well then one stud height measure, then 96" over stud measure.

Same thing.

Let us know if that works out for you. Marc

 

[jetnow1]

Keep in mind many a 4/12 pitch is cut just a little off, so taking actual measurements is
a good idea. Trusses are usually pretty good, but field cut rafters may not be perfect.

 

[csp]

Two of the sides of the triangle will be at a right angle to each other. You only need to know those two measurements. The third side (angled piece) is a chalk line between the ends of the horizontal and vertical measurements. No need to make it harder than that.

 

[Kevin54]

4/12 pitch = 18 1/2 degrees

 

[blair683]

I got it done the other day. For the 8' pieces on either end I just measured the small side then added 32" for the long side then snapped a chalk line. For the next two pieces that went to the peak each piece was 7' long. So I just measured the length of each side and snapped a line. It worked out great.