2007年3月10日 · You will be able to design your rebar requirements and spacings from these tables. Except for the Lintels,of course. Tables for them too. Standard bar lap is 40 x's bar diameter. Contact splicing is allowable. No tying. Backfill with respect after your floor deck is on. Another tip, one 3/4 in bar equals two 1/2 in bars ( your #4 i think).

2006年1月19日 · The Engineer shows a 4″ Slab 3500psi with 6×6-W1.4xW1.4 wire mesh, I would like to use rebar in place of the wire mesh as in my experience wire mesh usually ends up in the bottom of the slab, I also do not think a 4″ slab is enough for a shop that will have 80,000lb trucks in it. If rebar is used what should the spacing and size be?

2002年11月10日 · rebar does nothing buy keep concrete from bending, by more weight on top it will bend more. size of rebar does not matter it is total size of all steel in footing that matters. 3 #4 or 2#6 basically the same. So figure how much weight, soil condions then how big of foting you can put in place. By pouring a stronger mix you can use less rebar.

The 2018 IRC introduced Table R507.3.1 Minimum Footing Size for Decks and it makes sizing concrete footings for a deck simple. The table has three main columns—one for Live or […]

2002年11月19日 · It create a bending of the slab. rebar strength is in tension, so by adding rebar to BOTTOM of foundation, it counter acts the load of compression. a car weight about 5000lb. It has a foot print of four tires about 10 inches by 10 inches time 4. that is 2.74 sq feet 5000/2.74 equals 1824 lbs per sq feet. a weak concrete has a compression ...

2003年5月27日 · How much rebar is standard in a poured wall? The one contractor specifies 1 horizontal row in the 4′ frost walls (walkout basement on two sides) and 3 horizontal rows in an 8′ high wall. The other contractor did not specify but his overall allowance for rebar is 4 times higher.

The most common sizes in residential construction are #4 and #5 rebar, typically with two continuous lengths located toward the bottom of the footing. Keyways were once a standard method to make sure a foundation wall would not shift off a footing when backfilling, but all of my plans prescribe rebar to keep the walls in place.

2010年10月26日 · Once you have the load on each footing, you divide the PSI of the soil into that load to calculate the square inches of footing needed. Since footings only come in certain sizes, you're most times going to be 50-100% oversized on a footing, but it's best to have them reasonably "balanced" so that any subsidence will be uniform.

2019年4月17日 · I am building a patio home (concrete slab) and they will soon be pouring the foundation. One concrete worker that I know suggested that they should use 8 gauge mesh […]

2006年12月15日 · A good rebar installation will look somewhat neat, orderly, and the concept of the anticipated loads should be pretty clear. But for most applications, the ties only hold the rebar in place until the concrete cures a little. Placement is what is important. If the rebar is overlapped in close proximity that is really good enough in most cases.