Reinforcing Steel
REINFORCING STEEL:
Reinforced concrete was designed on the principle that steel and concrete act together in resisting force. Concrete is strong in compression but weak in tension. The tensile strength is generally rated about 10 percent of the compression strength. Steel is the best material for reinforcing concrete because the properties of expansion for both steel and concrete are considered to be approximately the same; that is, under normal conditions, they will expand and contract at an almost equal rate. At very high temperatures, steel expands more rapidly than concrete and the two materials will separate. Another reason steel works well as a reinforcement for concrete is because it bonds well with concrete. Reinforcing steel must be strong in tension and, at the same time, be ductile enough to be shaped or bent cold.
TYPES/FORMS:
* BARS OR RODS * PLAIN BAR * DOWELS AT EXPANSION JOINTS * CONTRACTION JOINTS IN ROADS AND RUNWAYS * COLUMN SPIRALS * DEFORMED BAR * MAIN REBAR * STIRRUPS AND TIES * COLUMN SPIRALS * EXPANDED METAL or WIRE MESH * WELDED WIRE FABRIC * SHEET METAL
Table 2.1 – Reinforcement bar sizes and dimensions. Source:http://www.sizes.com/materls/rebar.htm
Sizes and Dimensions | old bar size | "soft" metric size | Weight in pounds per foot | nominal diameter in inches (not including the deformations) | #3 | #10 | 0.376 | 0.375, that is, 3/8 | #4 | #13 | 0.668 | 0.500, that is, 4/8 | #5 | #16 | 1.043 | 0.625 | #6 | #19 | 1.502 | 0.750, that is, 6/8 | #7 | #22 | 2.044 | 0.875 | #8 | #25 | 2.670 | 1.000, that is, 8/8 | #9 | #29 | 3.400 | 1.128 | #10 | #32 | 4.303 | 1.270 | #11 | #36 | 5.313 | 1.410 | #14 | #43 | 7.650 | 1.693 | #18 | #57 | 13.60 | 2.257 |
Grade and Diameter | Grade | NOMINAL DIAMETER, mm | 230 | 10 | 12 | 16 | 20 | 25 | --- | --- | --- | --- | --- | 275 | 10 | 12 | 16 | 20 | 25 | 28 |
Reinforced concrete was designed on the principle that steel and concrete act together in resisting force. Concrete is strong in compression but weak in tension. The tensile strength is generally rated about 10 percent of the compression strength. Steel is the best material for reinforcing concrete because the properties of expansion for both steel and concrete are considered to be approximately the same; that is, under normal conditions, they will expand and contract at an almost equal rate. At very high temperatures, steel expands more rapidly than concrete and the two materials will separate. Another reason steel works well as a reinforcement for concrete is because it bonds well with concrete. Reinforcing steel must be strong in tension and, at the same time, be ductile enough to be shaped or bent cold.
TYPES/FORMS:
* BARS OR RODS * PLAIN BAR * DOWELS AT EXPANSION JOINTS * CONTRACTION JOINTS IN ROADS AND RUNWAYS * COLUMN SPIRALS * DEFORMED BAR * MAIN REBAR * STIRRUPS AND TIES * COLUMN SPIRALS * EXPANDED METAL or WIRE MESH * WELDED WIRE FABRIC * SHEET METAL
Table 2.1 – Reinforcement bar sizes and dimensions. Source:http://www.sizes.com/materls/rebar.htm
Sizes and Dimensions | old bar size | "soft" metric size | Weight in pounds per foot | nominal diameter in inches (not including the deformations) | #3 | #10 | 0.376 | 0.375, that is, 3/8 | #4 | #13 | 0.668 | 0.500, that is, 4/8 | #5 | #16 | 1.043 | 0.625 | #6 | #19 | 1.502 | 0.750, that is, 6/8 | #7 | #22 | 2.044 | 0.875 | #8 | #25 | 2.670 | 1.000, that is, 8/8 | #9 | #29 | 3.400 | 1.128 | #10 | #32 | 4.303 | 1.270 | #11 | #36 | 5.313 | 1.410 | #14 | #43 | 7.650 | 1.693 | #18 | #57 | 13.60 | 2.257 |
Grade and Diameter | Grade | NOMINAL DIAMETER, mm | 230 | 10 | 12 | 16 | 20 | 25 | --- | --- | --- | --- | --- | 275 | 10 | 12 | 16 | 20 | 25 | 28 |