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