Building Code of the Philippines(1)

40000 psi hot rolled rods hard grade

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Unformatted text preview: and shrinkage stresses either by use of reinforcement or by means of joints. Plain concrete construction shall conform to the detailed minimum requirements specified in this Chapter. Where Chapter 2 is applicable, plain concrete also shall be designed in accordance with the allowable stresses specified in this Chapter. (b) Wall thickness. The thickness of plain concrete walls may be 5 centimeters (2 inches) less than the required by 6.17 plain masonry walls but in no case less than 18 centimeters (7 inches) and the ratio of unsupported height or length (whichever is the lesser) to thickness shall be not greater than 22. (c) Design. Plain concrete walls shall be designed to withstand all vertical and horizontal loads as specified in Chapter 1. (d) Stresses. The allowable working stresses in plain concrete walls shall not exceed the following percentage of ultimate strength. Compression .......................................................................................................... 025 f ' Tension .................................................................................................................. 1.6 \/ f 'c Shear ...................................................................................................................... 0.02 f 'c Section 5.31: Load Tests on Structures (a) Notations. The notations used in these regulations are defined as follows: D = dead load. L = live load. A maximum deflection, produced by a test load, of a member relative to the ends of the span, or of the free end of a cantilever relative to its support. l t = = span of member under load test (the shorter span of flat slabs and of slabs supported on four sides). The span, except as provided in Section 5.31 (c) 3, is the distance between the centers of the supports or the clear distance between supports plus the depth of the member, whichever is smaller (in inches). = total thickness or depth of member under load test (in inches). (b) Static Load Tests of Structures. The Engineer shall have the right to order the test under load of any portion of a structure when conditions are such that cause doubt about the safety of the structure. A load test of a structure shall not be made until the portion subjected to load is at least 56 days old, unless the owner of the structure agrees to the test being made at an earlier age. When the whole structure is not to be tested, the portion of the structure though to provide the least margin of safety shall be selected for loading. Prior to the application of the test load a load which simulates the effect of that portion of the service dead load which is not already present shall be applied and shall remain in place until after a decision has been made regarding the acceptability of the structure. The test load shall not be applied until the structural members to be tested have borne the full dead load for at least 48 hours. Immediately prior to the application of the test load to flexual members (including beams, slabs,...
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