How much rebar?

[randal]

How much rebar should I expect to buy? I’m going to be doing 26’x30’ in front of my garage. 280’x4’ off side walks and 350’x12’ of drive way.. 4” thick I’ve come up with about 75-80 yards of concrete but not sure on the rebar.. my concrete guy is only going to supply forms and labor. Any cost I should expect besides sand, rebar, and concrete?

[Lazyman]

https://www.blocklayer.com/concrete/rebar-slabeng.aspx

[MRW]

Use the welded wire fabric and allow for 1' overlap/splice.

[IvoryRoot]

Don’t forget your forms as a expense unless you have some laying around.

[mavrick]

Use the welded wire fabric and allow for 1' overlap/splice.

Don’t do this!

Just figure all the rebar on 1 foot centers.

[glen]

Yep use rebar. I like to go one step up in size as well Small cost considering everything

[Huntindad]

Use the welded wire fabric and allow for 1' overlap/splice.

since it sounds like all the concrete is flat work with no structures on it, I think the welded wire fabric is fine.

The rebar/frabic just keeps the concrete from separating if it cracks...I think

But, that is IMO only. I will defer to the concrete experts...

[White Falcon]

The guy that put in my flag stone patio used rebar, 1' centers!

[IvoryRoot]

Use the welded wire fabric and allow for 1' overlap/splice.

Don’t go this route. Cheaper to pour it correctly once rather than to have to re pour it when it cracks.

[Wayno]

The welded wire is fine for the sidewalks but not for driveways and garage. I also think 4” is a bit thin for drives. I’d probably go with 5” min. As far as the rebar, you really should check with a geotechnical engineer who is familiar with the area. The soil conditions dictate more than anything what your slab detail should be.

[Coacheddy]

https://www.blocklayer.com/concrete/rebar-slabeng.aspx

That’s a good link. Saving this for future reference. Thanks for sharing.

[manwitaplan]

The welded wire is fine for the sidewalks but not for driveways and garage. I also think 4” is a bit thin for drives. I’d probably go with 5” min. As far as the rebar, you really should check with a geotechnical engineer who is familiar with the area. The soil conditions dictate more than anything what your slab detail should be.

This.

We have formed all driveways with a 2x6.

The slab should have a beam or beams.

Only use rebar number 3 in sidewalks and number 4 in drive and slab.

Do you plan to cure the concrete, are you only using redwood or do you plan to saw cut? Limestone or hard rock?



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[Randy Madden]

Length x width x 2 ( for both ways) x 12 (12" per ft.) x 1.075 (for 18" laps) devide by spacing (12",16", ect..) decide by 20 (length of bar)
Dead nut accurate every time!
I always allow a few bars extra for beefing up corners and intersections