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#1
03-06-2007, 05:39 PM
 lotechman WeldingWeb Artisan Join Date: Mar 2004 Location: B.C. Canada Posts: 2,139
gage distances on structural

Gage distance on angles is from the heel to the hole center. I know that for sure.
As for beams I have always thought it was center to center hole distance across the beam flange. Every print I have encountered has used this convention.
I discovered a print reading text that stated gage was from web centerline to hole. I so far consider this a misprint. Anyone else ran into this conflict???
#2
03-06-2007, 09:06 PM
 TEK WeldingWeb Craftsman Join Date: Jul 2005 Location: Davenport, Iowa Posts: 1,538
Re: gage distances on structural

Only way I have ever seen it is as you described, center to center of the holes,centered on the flange. How many wf have you seen where the web is centered perfectly on the flanges? Not many I'd bet---
#3
03-07-2007, 07:47 PM
 billie_ WeldingWeb Journeyman Join Date: Nov 2005 Posts: 100
Re: gage distances on structural

c to c ga unless only one hole then centre line of beam to hole
#4
03-07-2007, 08:24 PM
 lotechman WeldingWeb Artisan Join Date: Mar 2004 Location: B.C. Canada Posts: 2,139
Re: gage distances on structural

Quote:
 Originally Posted by billie_ c to c ga unless only one hole then centre line of beam to hole
This example was just that! The side view showed gage distance with an arrow then it noted F.S. only.
If the gauge given is four inches does that mean the single hole is to be four inches from centerline???
This was a school exercise so the complete beam dimensions were not included. I read it as two inches away from centerline while others saw it as four inches from centerline.
Until someone corrects me I will take gage distance as between hole centers whether it is one hole or two holes.
#5
03-08-2007, 02:00 AM
 TEK WeldingWeb Craftsman Join Date: Jul 2005 Location: Davenport, Iowa Posts: 1,538
Re: gage distances on structural

Quote:
 Originally Posted by lotechman Until someone corrects me I will take gage distance as between hole centers whether it is one hole or two holes.
"gage" has to have 2 points of reference. If 2 holes, then c.t.c. is right, no matter where it is on the flange. It could be an inch from the edge, then two inch gage, on a 8 inch flange. If only one hole, what do you measure from? It almost has to be the center of flange.Your example said" far side"so it has to be from centerline.
#6
03-08-2007, 01:45 PM
 DetailerDave WeldingWeb Apprentice Join Date: Nov 2006 Location: Wilmington, De Posts: 44
Re: gage distances on structural

Gage of a beam is measured from the C/L of the web to the holes equally on each side on the flange. If the gage is given as N/S or F/S only, divide the gage by 2 and go from the C/L of the web that distance. Example: If the gage is 3 1/2", the holes would be 1 3/4" from C/L of the web. If the gage callout is 3 1/2", N/S, or F/S only, the hole would be 1 3/4" to the side where it is called out.
Gage of a channel is measured from the heel. The heel is also considered the C/L of a channel for dimensioning purposes.
Angle is also measured from the heel.

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