Rebar question

[supratreo]

Not sure if this is the correct forums but its the closest i could find.
below is a drawing for rebar and concrete work i need to do. i just wanted to see if someone could confirm I'm reading it right.

holes is 18x43
rebar is #4 with the 4 top sections spaced 4" apart and the lower 2 at 12"
also states that there should be min. 3" clear cover on all steel embedded in concrete when cast against soil (which it will be).
so I'm safe to assume the rebar would be 12" square?


thank you

 

[Kaizen]

yea like a box. unless you have a lot of clay i'd spend the money on a form like a sono tube or make one out of plywood. I weld things like that together so it does not move. i have not had great luck with using the ties. If there is a flange on the top for a fence or such make sure you have the Jbolts ready in a template so you can push in after. I've tried tying them to the rebar but always seems to get screwed up. have fun

 

[supratreo]

thank you for the reply.
originally i wanted to use a sono tube but i think it might be a little difficult to dig that unless i use an auger. also, i don't think i'll meet the 3" clear cover requirement. figured id just dig and use plywood. the dirt has no clay.
I actually did want to weld it but wasn't sure if that was allowed, i'll be going that route.
for the j bolts, i was going to have them in place with a plywood template and pour around it.

 

[Rusted Nut]

Yes, your cage is 12”; with hoops @12” vert, and @ 4” vert @ top. If you’re getting this inspected or want to follow proper procedures, you can’t weld rebar unless it’s “weldable rebar”.

 

[supratreo]

well thank you for that bit of information. this will be inspected so i guess I'm using ties.

 

[mm08822]

I'd say the note does not match the drawing. If the top of floor is at 0", then rebar is @ 4, 8, 12, 16, 20, 32, 44 per the apparent spacing in the note. But concrete is only 43" deep. Seems like 4, 8, 12, 16, 28, 40 is needed to have 3" concrete below deepest coarse.