하늘땅

  (A) Cast-in anchors: (a) hex head bolt with washer; (b) L-bolt; (c) J-bolt; and (d) welded headed stud. (B) Post-installed anchors: (a) adhesive anchor; (b) undercut anchor; (c) torque-controlled expansion anchors [(c1) sleeve-type and (c2) stud-type]; (d) drop-in type displacement-controlled expansion anchor; and (e) screw anchor. (a) Tensile loading b) Shear loading Fig. R17.5.1.2—Failure modes for anchors. 출처 : ACI318-19

What is Horse Power Horse, ower (hp) is a measurement of how much power an engine produces.  It's calculated by the force needed to move 550 pounds one foot in one second, or 33,000 pounds one foot in a minute.  For example, a single horse can raise a 33-pound bucket of water from the bottom of a 1,000-foot well in 60 seconds, which is equal to one. DIN 66036 defines one metric horsepower as the power to raise a mass of 75 kilograms against the Earth's gravitational force over a distance of one metre in one second: 75 kg × 9.80665 m/s2 × 1 m / 1 s = 75 kgf ⋅m/s = 1 PS. This is equivalent to 735.49875 W, or 98.6% of an imperial horsepower.

REFERENCES ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-02) and Commentary (318R￾02),” American Institute, Farmington Hills, Michigan, 2002, 443 pp. Anderson, A. R. "Lateral stability of long prestressed concrete beams". PCI Journal, 16(3), 7-9. May-June 1971. Bairán, J. M. and Cladera, A. (2014). “Collapse of a precast concrete beam for a light roof. Importance of elastomeric bearing pads in the element’s stability.” Eng. Failure Analysis, 39, 188-199. Billing, K. (1953). Prestressed Concrete. D Van Nostrand Company, Inc., New York. Burgoyne, C. J., Stratford, T.J. (2001). "Lateral instability of long-span prestressed concrete beams on flexible bearings". The Structural Engineer, Volume 79/No 6, March 2001. Castrodale, R. W. and White, C. D. "Extending Span Ranges of Precast Prestressed Concrete Girders". National Cooperative Highway Research Program, Report 517. Washington D. C., 2004. Chamorro, E., A...