Lg. corner rad. some ways to mark square lines on the faces

Date 05-20-2010 23:30

Hello folks, quite some time ago I included some methods for marking square lines on structural tubes where the corner radi are too large to allow for a standard square or speed square to work very well or very accurately. I'm reintroducing some of these methods along with an additional one. The last example allows you to position your rule and allow for the end to be used to "drag" along the tube when that sort of layout line is required. I would appreciate any comments, suggestions, examples from others on their approaches to this sort of challenge. I've included a number of pictures here. Best regards, Allan

Large angle with handle and both ends cut very squarely or machined square (83k)

Piece of alum. sheet with formed flange on one end and both edges square to flange (75k)

Carpenter's square with blocks attached to one edge to catch the lower face of tube for square ref. (63k)

Picture showing how blocks extend below radius to improve accurate squaring (75k)

Picture showing how blocks can be used in the same manner as stair gage blocks for angles (77k)

Angle and rule, pick-up square edge and set length if needed (95k)

Picture shows how system works to reference to side of tube and provide accurate squaring (105k)

Picture shows line drawn across face of tube and how angle is placed against edge (157k)

By mcostello (**)

Date 05-21-2010 03:12

Man, you are chock full of good ideas. Now to remember them...............

By aevald

Date 05-21-2010 04:08

So Mark, do you have any you care to share? Best regards, Allan

By mcostello (**)

Date 05-22-2010 03:18

I thought I knew how to weld until I came here and the Hobart site, I mostly crawl under my rock in the corner now. More to learn than I ever thought possible. When I find something I'll be glad to post.

By Skaggydog (**)

Date 05-22-2010 21:51

HI Allan
I guess you could notch your large angle with handle so as you could guide your soapstone at different gages down the tube.

By aevald

Date 05-22-2010 23:16

Hello Skaggydog, that's certainly a variation that could be added to it. Thanks for the comment, best regards, Allan