Simple question, not likely a simple answer right. Guy calls today, we need 50 pieces of rebar, 4 foot long, L shape, long side 32", short side 16", #6 rebar. This is for a foot bridge at a condo complex, where I've done handrail work....and soon a foot bridge. Anyhow, from seeing the project I'm betting and engineer has been involved in this for the concrete footers for the bridge. From searching around on here I've seen different grades of rebar. My assumption is when they tell me number 6 rebar they need to read the plans and tell me #6 grade blah, blah rebar, correct?
Next question, best way to bend the 90? Would it be alright to heat the rebar and bend it into a 90? Or is a cold bend the best way? I was thinking that if it was heated hot enough to bend that it may weaken/change the rebar in some way from what it has been design for?
Educate me and no I'm not doing the concrete work, just the "steel guy" so they call me for things like this......yeah, I know, I don't know why either. I have not messed with rebar but here I am.
As always any info is greatly appreciated,
Shawn
Heat and rebar means reject inspection. You can not cut, bend, or weld rebar. It won't pass inspection whether it's a state job or a city inspected job. It needs to be shear cut and manually bent. If you have the right bender it's pretty easy.
By Cumminsguy71
Date 07-20-2010 19:03
Edited 07-20-2010 19:24
Only hicky's I know about are the ones I got in high school!!! Checked out Johns link, those are pretty slick. You staying busy? I got some work, well, working single hand up in Clarksville with a no longer Union Ironworker slinging steel and welding. Be up there for a week or two, think he said a week job. Pay's not great but this is a friend of a friend and figure there can be a lot learned working around his experience, not to mention if I can prove myself and that's just another phone number for future stuff. Get to learn some of the lingo, be a smartazz ironworker, hahaha! Pretty stoked for the opportunity, ready to learn! Getting the "hope I don't look like a dumbazz" jitters now! LOL!! Gonna camp out in his travel trailer for the time I'm up there, save some serious $$$ by not making that drive everyday!! 2 hours each way, ouch! Kept threatening my wife that I was gonna leave! Hahahaha!
ASTM A615 is the standard type of rebar used for reinforcement in concrete building structures. The most commonly used grade is Grade 60 (Fy = 60 ksi), but is also available in Grade 40 and Grade 75.
ASTM A706 is a rebar intended for applications requiring controlled tensile properties (i.e. seismic applications) and applications requiring enhanced weldability. It is available in only one grade, Grade 60 (Fy = 60 ksi).
The diameter of the bends must conform to the following requirements:
For ASTM A615
Bar Diameter Min. Bend diameter (D)
1/2” 1 3/4"
5/8” 2 1/4"
3/4” 3 3/4"
7/8” 4 1/2"
1” 5"
For ASTM A706
Bar Diameter Min. Bend diameter (D)
1/2” 1 1/2"
5/8” 2"
3/4” 3"
7/8” 3 1/2"
1” 4"
If welded, the weld should not be closer than 2 bar diameters from the bend.