Sessional papers of the Dominion of Canada 1909 . \< •/•-- - -*J ^ Chamber Wall 187,500 X 22Factor of safety = -^-g;^^^^^^-=1-8 GEORGIAX BAY SHIP CAXAL SURVEY 45ff SESSIONAL PAPER No. 19a (h) Chamber empty and pressure of filling in roar of wall. (See fig. 2.) Concrete - 125 lbs. per cubic foot. Earth = 100 lbs. per cubic foot. Area = 1,500 sq. feet. Weight = 1,500 X 125 lbs. = 187,500 lbs. = W 56 X 60Area of triangle 1,680 sq. feet. Zi Total weight of triangle = 168,000 lbs. = P The pressure T of the earth, if the earth is assumed as level with the coping and without friction on the b
Sessional papers of the Dominion of Canada 1909 . \< •/•-- - -*J ^ Chamber Wall 187,500 X 22Factor of safety = -^-g;^^^^^^-=1-8 GEORGIAX BAY SHIP CAXAL SURVEY 45ff SESSIONAL PAPER No. 19a (h) Chamber empty and pressure of filling in roar of wall. (See fig. 2.) Concrete - 125 lbs. per cubic foot. Earth = 100 lbs. per cubic foot. Area = 1,500 sq. feet. Weight = 1,500 X 125 lbs. = 187,500 lbs. = W 56 X 60Area of triangle 1,680 sq. feet. Zi Total weight of triangle = 168,000 lbs. = P The pressure T of the earth, if the earth is assumed as level with the coping and without friction on the back of the wall, is ^ 168,000x32 ^ ^ „ T = - - - ^^ = 89,600 lbs. dO Chamber Wall , , 187, Factorof safety =-g^^^^--—= If we had taken into consideration the effect of the friction of the earth on backof wall, the factor of safety would have been much larger. 454 DEPARTMENT OF PUBLIC WORKS 8-9 EDWARD VII., A. 1909 (c) Chamber empty and pressure of water in rear of wall. (See fig. 3.) Area = 1,500 sq. feet. Weight = 1,500 x 125 = 187,500 lbs. = W Water pressure = 65 x 6% x = 121,875 say 122,000 lbs. = P
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