Guidelines for measuring steel reinforcement & its quantity in slab, beams, columns & footing
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Reinforcement Steel is also known as rebar. It’s application is mostly found in bridges, buildings, skyscrapers, homes, warehouses, and foundations to enhance the strength of a concrete structure.
Reinforcing steel is utilized in concrete to add extra strength, because concrete is strong in compression but weak in tension whereas steel is strong in both tension and compression. So, reinforcement bar is cast into the concrete to bear the tensile loads efficiently.
Common steel or concrete reinforcement bar is delivered with heavy ridges to facilitate binding the reinforcement to the concrete mechanically. It is generally described as deformed bar.
One can obtain the following information from the RCC Drawings :-
1. Length of the element
2. Cross section
3. No of bars
4. Type of bars
5. Spacing between the bars
6. Lap length ( horizontal/vertical)
7. Development length
8. Covers for footing/column/beam/slab
Process for measuring the cutting length of the bars. ( total length - covers on bothside )+ development length.
3.Formula: W = N*CL*U
W: Weight of reinforcement
N: No of bars
CL: cutting length
U:Unit weight
Apply the following formula to find out Unit weight from charts or from the formula - U= D*D/162
Ref.: onlinecivilforum.com
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