2010年6月26日星期六

PIT EXCAVATION

-ISOLATED PITS PRIMARILY USED FOR COLOUMS OR PIERS ON PAD FOUNDATIONS

  1. SIDES OF EXCAVATION CAN BE BATTERED OR STRAIGHT DEEP PITS MAY HAVE TO BE OVER EXCAVATED IN PLAN TO PROVIDE GOOD ACCESS TO AND GOOD DEGREE FROM THE WORKING AREA FOR BOTH MEN AND MATERIALS

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