Building Code of the Philippines(1)

And shall when necessary underpin and support the

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Unformatted text preview: less than 0.2 square meters (2 square feet) to not less than twice the maximum bearing capacity desired for use. Such load shall be sustained by the soil until no additional settlement takes place for a period of not less than 48 hours in order that such desired bearing capacity may be used. Examination of sub-soil conditions may be required when deemed necessary. TABLE 7.04 - (A) ALLOWBLE SOIL PRESSURE INCREASE IN VALUE MINIMUM FOR EACH DEPTH OF FOOT OF CLASSIFICATION FOOTING VALUE PERDEPTH THAT OF MATERIAL BELOW- MISSIBLE IF FOOTING ADJACENT FOOTING IS IS BELOW VIRGIN AT MINIMUM MINIMUM GRIOUND DEPTH DEPTH 1 2 Meter ROCK 0.20 0.30 3 4 Ft Kg./Sq.M MAXIMUM VALUE 5 PSF Kg./Sq.M PSF Kg./Sq.M PSF 20% ultimate 20% ultimate 1-0 crushing strength 0 0 crushing strength Compact Coarse Sand 0.60M 2-0 7,500* 1,500* 1,500* 300* 40,000 8,000 Compact fine sand 0.60M 2-0 5,000* 1,000* 1,000* 200* 40,000 8,000 Loose sand 0.90M 3-0 2,500* 500* 500* 100* 15,000 3,000 Hard clay or sandy clay 0.60M 2-0 20,000 4,000 4,000 800 40,000 8,000 Medium-stiff clay or sandy clay 0.60M 2-0 10,000 1,000 1,000 200 30,000 6,000 Soft sandy clay or clay 0.90M 3-0 5,000 250 250 50 10,000 2,000 Compact inorganic sand silt mixtures 0.60M 2-0 5,000 1,000 1,000 200 20,000 4,000 Loose inorganic sand silt mixtures 0.90M Loose organic and silt mixtures and muck 3-0 2,500 500 0 500 0 100 5,000 1,000 0 0 0 0 *These values are for footing 30 cm. (1'0") in width and may be increased in direct proportion to the width of the footing to a maximum of three times the designed values. TABLE 7.04 - (B) ALLOWABLE LATERAL SOIL PRESSURES ALLOWABLE VALUES CLASS OF MATERIAL PER FOOT OF DEPTH* MAXIMUM ALLOWABLE BELOW NATURAL GRADE VALUES k.s.m. Good-compact well graded sand and gravel Well-graded fine and coarse sand (all drained so water will not stand) p.s.f. k.s.m. 2,000 Average-compact fine sand Medium clay Loose coarse sand and 1,000 gravel (All drained so water will not stand) 400 200 Poor-soft Clay Clay Loam Poorly Compacted Sand 500 Clays containing large amount of silt (water stands during wet season) 100 p.s.f 40,000 12,500 7,500 8,000 2,500 1,500 *Isolated poles such as flagpoles, or signs may be designed using lateral bearing values equal to two times tabulated values. REPUBLIC OF THE PHILIPPINES Department of Public Works, Transportation and Communications Quezon City Department of Local Gov't. and Community Development Quezon City Hall, Quezon City JOINT MEMORANDUM CIRCULAR - August 17, 1977 TO : ALL PROVINCIAL GOVERNORS, CITY MAYORS, MUNICIPAL MAYORS AND ENGINEERS SUBJECT : DISSEMINATING P.D. NO. 1096 OTHERWISE KNOWN AS THE NATIONAL BUILDING CODE OF THE PHILIPPINES AND ITS IMPLEMENTING RULES For the information and guidance of all concerned the President has enabled the National Building Code effective as of February 19, 1977 and its implementing rules and regulations have been promulgated by the Secretary of Public Works, Transportation and Communications on June 16, 1977. Scope - Th...
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