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  2. Rebar - Wikipedia

    en.wikipedia.org/wiki/Rebar

    Number 4 rebars spaced 12 inches on center (center-to-center distance) on both the top and bottom faces and in each way as well, i.e. longitudinal and transverse. (3) #4 Three number 4 rebars (usually used when the rebar perpendicular to the detail) #3 ties @ 9 OC, (2) per set Number 3 rebars used as stirrups, spaced at 9 inches on center.

  3. Commercial Metals Company - Wikipedia

    en.wikipedia.org/wiki/Commercial_Metals_Company

    Commercial Metals Company (CMC), headquartered in Irving, Texas, is a producer of rebar and related products for the construction industry. Along with Nucor, it is one of two primary suppliers of steel used to reinforce concrete in buildings, bridges, roads, and infrastructure in the U.S. The company also owns Tensar, a producer of foundation ...

  4. Reinforced concrete - Wikipedia

    en.wikipedia.org/wiki/Reinforced_concrete

    Sea water contains by weight approximately 3.5% salts. These salts include sodium chloride, magnesium sulfate, calcium sulfate, and bicarbonates. In water these salts dissociate in free ions (Na +, Mg 2+, Cl −, SO 2− 4, HCO − 3) and migrate with the water into the capillaries of the concrete. Chloride ions, which make up about 50% of ...

  5. List of steel producers - Wikipedia

    en.wikipedia.org/wiki/List_of_steel_producers

    This is a list of the largest steel-producing companies in the world mostly based on the list by the World Steel Association.The list ranks steelmakers by volume of steel production in millions of tons over time and includes all steelmakers with production over 10 million in 2021.

  6. Reinforced concrete column - Wikipedia

    en.wikipedia.org/wiki/Reinforced_Concrete_Column

    ACI Code 7.10.4.2: For cast-in-place construction, size of spirals shall not be less than 3/8 in. diameter. ACI Code 7.10.4.3: Clear spacing between spirals shall not exceed 3 in., nor be less than 1in. Section 10.9.3 adds an additional lower limit to the amount of spiral reinforcement via the volumetric spiral reinforcement ratio ρ s.

  7. Ufer ground - Wikipedia

    en.wikipedia.org/wiki/Ufer_Ground

    In 1978, the NEC allowed 1/2 inch rebar to be used as a grounding electrode [NEC 250.52(A)(3)]. ... [4] Ufer grounds, when present, are preferred over the use of ...

  8. CHART #4: SIDE-BY-SIDE COMPARISON OF REPUBLICAN ... - HuffPost

    images.huffingtonpost.com/2007-07-09-blumenthal...

    CHART #4: SIDE-BY-SIDE COMPARISON OF REPUBLICAN CANDIDATESÕ HEALTH PLANS By Susan J. Blumenthal, M.D., Jessica B. Rubin, Michelle E. Treseler, Jefferson Lin, and David Mattos* Sam Brownback Jim Gilmore Duncan Hunter Ron Paul, M.D. Tom Tancredo Stated Goals ! Create a consumer-centered, not government-centered, quality health care model

  9. List of construction methods - Wikipedia

    en.wikipedia.org/wiki/List_of_Construction_methods

    [3] Formwork for beams takes the form of a box that is supported and propped in the correct position and level. The removal time for the formwork will vary with air temperature, humidity and consequent curing rate. Typical striking times are as follows (using air temperature of 7-16 °C): Form work. Beam sides: 9–12 hours. Beam soffits: 8 ...

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