not in most areas, but the best way to be sure is to call your local building inspector.but odds are they will say no. don't worry a well bult cinderblock foundation will bear enormous weight.
metal ones
I think that they can, if they are both used correctly, the cement and concrete bricks can be put together in the same wall construction. :) <><><> I think you need to define some words. Concrete is made by mixing portland cement, water, and sand/crushed stone. There ARE no "cement bricks" Traditional bricks are made by mixing clay, shale, and water, and baking them in a kiln (oven) at high temperatures. And yes, regular clay brick and concrete brick/ block are frequently both used in a wall. Together.
A Lally Lock column is a concrete filled steel column that does not need to have the cap or base plates welded. The top end of the column is fitted with an embedded fastening unit that will accept a 1/2" screw to fasten the cap plate onto the column. The bottom end it just concrete and can be cut with a pipe cutter. Base plates are fastened with concrete screws.
the 5,000 psi is the amount of pressure the concrete can withstand before it will crush. it has nothing to do with water proofing. to find out if you need water proofing you need to know how poores the concrete is and how quickly the ground out side will drain water. it only takes about 6 psi for water to penatrate most concrete walls, it is more a matter how long the water is alowed to stay against the wall, there for how far through the concrete it can penatrate if you have a good working drain you will most likely never need water proofing. but if you dont own a backhoe it is far cheaper to put it on the outside before the hole is filled.
form_title= Concrete Sealer form_header= Seal all the projects in your home with concrete sealer. What is the sealer for?*= _ [50] How much sealer do you need?*= _ [50] Have you ever used sealer?*= () Yes () No
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.
It depends on what you are trying to repair. There are concrete floor and foundation repair contractors that specialize in this. You can contact them to get the best ideas on how to repair your foundation. You must determine the methods for repairing and the type: slabjacking, concrete repair, mudjacking and concrete piering. You can read more about it at www.concretenetwork.com/concrete/foundation_repair
metal ones
My Astronomy professor says that we need at least 15 feet of concrete to block nuclear radiation.
Yes, a concrete patio step does in fact need to be on a footing. Without the proper footing foundation, the step will be uneven.
That depends on what the foundation is for and what local law says about. Technically, you don't need any steel, since there are other ways to reinforce concrete.
need concrete cement block 10m*1m*.60m for flag fixing on ground
Well assuming the depth of concrete is going to be 1 meter you will need 846 cubic meters of concrete.
form_title= Concrete form_header= Redo your home with concrete. What area do you need filled?*= _ [50] What is the square footage of that area?*= _ [50] Do you want to hire a professional to fill the area?*= () Yes () No
Most houses don't use common bricks for the foundation. Concrete is more effective and commonly used.
You will need a professional concrete contractor to set a foundation for the stairs,
A concrete block is 18 inches long and 8 inches high. Therefore, about 6 block for each side = 9 feet 6 inches, with the end block of the next side turned sideways. 4 sides X 6 block is 24 block per course and where I live I would need at least 6 coarses below grade for a total of 144. I would get 10% extra just in case which would make it 158. You would have to add to this for any height above grade.