Depends on stress and loading. adding it is a safe bet
The amount of rebar depends on the thickness of what you are making. All three dimensions.
Yes, if you are constructing this wall with concrete block you will need #5 rebar dowels stubbed out of the foundation at 32" on center. You will also need one #5 rebar running continues in the top course and fill all cells with dowels and top course with either structural grout or concrete.
You still need rebar, unless you are filling a drop in an existing slab that already has steel in it.
Yes, it is recommended to use rebar for a 4-inch slab to provide additional strength and prevent cracking.
You need the size of the rebar involved to calculate the weight. Charts can be found at CRSI.org or Rebarapps.com. Than take that and multiply it by the the length of the rebar. For example, a #4 rebar weighs 0.668 lbs/ft. If you have 5 @ 20-00 pieces that is 0.668 X 20 X 5 = 67 lbs. You need to know the size of the bar to calculate.
If the condition of the existing foundation is determined to be sound for the LIFE of the proposed structure and the proposed structure does not exceed the limitations of the existing structure. (example- putting a 2 story garage/apt on a foundation designed for the load of a one story garage)
To determine the amount of rebar needed for a 20 x 60 x 8 inch slab, you first need to calculate the perimeter and then the spacing of the rebar. For a typical slab, rebar is usually placed at 12 to 18 inches apart in each direction. Assuming you use #4 rebar (0.5 inches in diameter) spaced at 16 inches on center, you would need approximately 8 pieces of rebar along the 20-inch side and 5 pieces along the 60-inch side, totaling around 13 lengths of rebar, considering overlaps and cut-offs. Always consult local building codes and structural engineers to confirm specific rebar requirements for your project.
Typically there are two types of submittals for rebar. the first is placing drawings. These drawings will act as a set of instructions for fabrication and installation of the rebar. These drawings can be created and supplied by the rebar fabricator or a specialized outside detailer can provide them for you. The second is the actual product data which indicates the mill the material came from, its chemistry composition and production information. For this, the fabricator or supply house you purchase the rebar from should be able to supply you with the sheet data you need. Both the placing drawing and material data sheets will be submitted to the architect and engineer of record to review and verify that the rebar conforms with their intent and design.
To determine how many pieces of 12mm rebar make a ton, first, calculate the weight of a single piece. A 12mm rebar typically weighs about 0.888 kg per meter. Therefore, for a standard length of 12 meters, one piece would weigh approximately 10.66 kg. Since there are 1,000 kg in a ton, you would need about 94 pieces of 12mm rebar per ton.
form_title=Basement Waterproofing form_header=8683 Please specify the current condition of the foundation area in need of waterproofing.*= () Wall is exposed () Wall is not exposed What type of foundation does your house have?*= {Select One,Poured concrete slab foundation,Brick or stone foundation,Poured concrete basement,Insulated concrete foundation,Concrete block foundation,Concrete pier foundation,Poured concrete with crawl space,Don't Know} What are some of the problems you are experiencing with the foundation?*= [] "Mold, mildew, and/or fungus [] Excessive dampness [] Discoloration, odors, or rust [] White powder or spots on walls [] Hairline cracks [] Basement flooding [] Buckling or bowing walls [] Mud or clay silt surfacing inside [] Corners shifting and cracking [] Floor dropping or other changes"
There are several advantages to strip foundation. They include being a proven method that the majority of builders know how to use it is easy for keeping the bricklayer occupied, it is fairly cheap, mistakes are too pricy to rectify after concrete has been poured, and services usually do not need immediate attention since they usually cross over the concrete.
Depends on the size of the patio. Most can be done with only 6"X6" wire mesh.