Sessional papers of the Dominion of Canada 1909 . n calculate S the fraction of S applied 40 above recess the moments about the point of application of S we have g S X 20 = -- X 40o S=liiill?M2L=)bs. Water pressure on gate recess wall— Half area of gate recess = 20 x 30 = 600 sq. water pressure = 3% x = pressure Q = x 600 = 562,500 the total pressure P applied 40 above recess floor will beP = S + Q = 2,778,750 lbs. + 562,500 lbs. = 3,341,250 lbs. The thrust P will be applied to the block of concrete A B C D {see fig. 6) 50 lon
Sessional papers of the Dominion of Canada 1909 . n calculate S the fraction of S applied 40 above recess the moments about the point of application of S we have g S X 20 = -- X 40o S=liiill?M2L=)bs. Water pressure on gate recess wall— Half area of gate recess = 20 x 30 = 600 sq. water pressure = 3% x = pressure Q = x 600 = 562,500 the total pressure P applied 40 above recess floor will beP = S + Q = 2,778,750 lbs. + 562,500 lbs. = 3,341,250 lbs. The thrust P will be applied to the block of concrete A B C D {see fig. 6) 50 lonj Area of wall = ^ 20 x 30 + -^^ + 5 x 25+ x 15 j = 775 sq. ft. {See fig. 10) Total volume of concrete block = (775 x 50) -gate recess voidGate recess void = 2,820 cubic feet Total volume of wall = (38,750 - 2,820) = 35,930 cubic feetTotal weight of wall = 35,930 cubic feet x 125 lbs. = 4,491,250 lbs. GEORGIAN BAY SHIP CAXAL SURVEYSESSIONAL PAPER No. 19a 461 Fig. 10 l«-.*-»fi ^ >j T- — -^- - y.»..,w.,-.,<u- .;?? , J. Lower Abutment WallSection throgate recess T7„ + r j: . 4,491,250 X ± actor of safety = —-—— = i q 3,341,250 X 462 DElAliTMENT OF PUBLIC WORKS 8-9 EDWARD VII., A. 19G9 APPENDIXGEORGIAN BAY Estimate of ^Material in Lock Gates, Lock Dimensions .—Length, 650 feet; Compiled by A. J. Mathesox^ W=[(-000533 0+-0276 b2+(—-064 D—1-876) Ts+l-93 D+51-75] H2+[(-06 b2-f (—315 -89 D+5658 -6) W=Weight in lbs. of steel in one leaf of single skin mitering gate; Ix)cati(>n. Number of Gates. 1 Montreal 2 Verdun 3 Ste. Anne 4 Pointe Fortune 5 Hawkesbury 6 Hull No. 1 7 Hull No. 2 8 Chats 9 Chenaux 10 Rocher Fendu No. 1 11 Rocher Fendu No. 2 12 Paquette 13 Des Joachims 14 *Rocher Capitaine. .. 15 16 Deux Rivifere.! 17 Mattawa 15 Plain Chant 19 I^s Epines ,2 J ffi Weight of Gate Com-plete (Two Leaves). ; Upper. Lower Upper Lower Upper Lower Upper Lower Upper I-ower Uppe
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