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Cutting galv roofing panels

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Jim-IL

06-24-2002 16:34:50




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I have to cut some sheets of corregated roofing in half. Whats the best way to do this?




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Bruce L.

06-25-2002 06:56:08




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 Re: cutting galv roofing panels in reply to Jim-IL, 06-24-2002 16:34:50  
I have used an air powered nibbler to do this. It makes a clean cut without any heating certainly but the sharp little "nibbles" get all over the place. You may have to alternate with cutting from above the sheet to below in order to make it through the corregations.

BL



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Steve U.S. Alloys

06-25-2002 05:48:58




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 Re: cutting galv roofing panels in reply to Jim-IL, 06-24-2002 16:34:50  
Jim, I used a slotted metal cutting blade in my 7 1/4" saw. I've cut everything from square tubing to metal sheet siding with it and it has never needed sharpening. It cuts fairly fast. It too is loud but didn't burn the paint off the tin siding. It did create some small hot sparks that felt a lot like welding spatter.
Steve



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revredneck

06-25-2002 05:37:06




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 Re: cutting galv roofing panels in reply to Jim-IL, 06-24-2002 16:34:50  
Jim,
I have used the circular saw trick myself. Just one word of warning. Be sure to protect your ears when you do it. It is VERY LOUD! Good Luck and God Bless,
Tommy



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John

06-24-2002 20:30:45




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 Re: cutting galv roofing panels in reply to Jim-IL, 06-24-2002 16:34:50  
A fine tooth saw blade in backwards works great. I have cut many a sheet of roofing and siding with such an animal.



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kfen

06-25-2002 05:41:26




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 Re: Re: cutting galv roofing panels in reply to John, 06-24-2002 20:30:45  
I second or third the advice of the others. Use a circular saw with the blade in backwards. works great. the only draw back is it heats the panel and burns the paint off the edge or in your case the galvinized and will rust in the long run. go slow and keep the heat down.



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ShepFL

06-25-2002 05:08:56




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 Re: Re: cutting galv roofing panels in reply to John, 06-24-2002 20:30:45  
As posted by Jim is just what I did on my shop. I did not have to cut any roof panels only wall panels. Works great!



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Ryan

06-24-2002 20:08:51




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 Re: cutting galv roofing panels in reply to Jim-IL, 06-24-2002 16:34:50  
I have used a circular saw with an old blade on backwards and it worked plenty well for me. There is not to much of a bur.



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thurlow

06-24-2002 18:25:01




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 Re: cutting galv roofing panels in reply to Jim-IL, 06-24-2002 16:34:50  
How pretty does it need to be??? If it doesn't particularly matter, it can be done very quickly with a sharp axe. Make a sandwich of two 2 x 6s or something similar, with the tin as the filling. Stand on the top plank to clamp it together and chop; using the edge of the plank as a guide. Separate your hands and take short strokes. Need to also "drag" the axe as you hit, so you get about 8 or 10 inches travel with each stroke. And no, this will not harm (or particularly dull) the axe.

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T_Bone

06-24-2002 17:13:11




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 Re: cutting galv roofing panels in reply to Jim-IL, 06-24-2002 16:34:50  
Hi Jim,

If your going to cut alot of them, stack them together then clamp the stack at four corners, use a straight edge for the cut clamping the center cut area, then use a abrasive cut off wheel on a circular saw. The faster you feed the saw the more burs that will be left on the cut sheets and the tighter clamped the sheets are and a thinner abrasive wheel, the less burring. A deburing wheel (the emery paper type) on a side grinder works well.

If cutting a few sheets then a pair of bull shears (tin snips with long jaws) is plenty fast. Can't cut straight (no slam intended), use a piece of angle iron for a straight edge.

T_Bone

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Mike W

06-24-2002 18:06:40




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 Re: Re: cutting galv roofing panels in reply to T_Bone, 06-24-2002 17:13:11  
Hi, I've had good luck by clamping several sheets with a piece of 2" angle iron. I use a Sawzall guided by the edge of the angle iron. Only minor burrs that can be filed are left.



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