. Railroad structures and estimates . .4293 32 33 isioj/ 65° \ 33 34 142 34 35 ■ 3. 145K 70 \ 35 36 : - 149 • \ 36 37 36 I5W 75 \ 37 38 ^ 37 154 38 39 38 157K 80 \ 39 40 ^ 39 ibii 40 40 85 1 36 QUANTITIES IN REINFORCED RETAINING WALLS. TABLE 25. —REINFORCED RETAINING :Earth assumed to weigh 100 lb. per cu. ft.; concrete, 150 load, 135 lb. per sq. ft. with
. Railroad structures and estimates . .4293 32 33 isioj/ 65° \ 33 34 142 34 35 ■ 3. 145K 70 \ 35 36 : - 149 • \ 36 37 36 I5W 75 \ 37 38 ^ 37 154 38 39 38 157K 80 \ 39 40 ^ 39 ibii 40 40 85 1 36 QUANTITIES IN REINFORCED RETAINING WALLS. TABLE 25. —REINFORCED RETAINING :Earth assumed to weigh 100 lb. per cu. ft.; concrete, 150 load, 135 lb. per sq. ft. without impact. Unit stresses: concrete (1-2-4), 600 lb. per sq. in. compression shear, 50 lb. per sq. in.; steel(square twisted bars or equivalent deformed section), 16,000 lb. per sq. in. ^-15 On clay foundation wall to be anchored against sliding. 3 in. weep pipes to be provided at distances not greater than 5 ft. apart. At least 18 in. of broken stone backing to be provided to facilitate drainage. lO c> Concrete in Cu. r ,t! T CD± W-Anchorage against sliding e» \\ ~ t\X-- tVffi- -S- 4- ^ -1-4- to «M — sl- T3 ^ P Oi \5. ^s x,^ T ^ \ \ ^ I ^ -\ to S -- *^ to V I ts 1 ^ to I \ +:;::;::>, T 5 o »0 > - ^ to H o Stee I in Pounds c (lO/5added.£oi splices) Height in 8 12 16 20 24 Toe slab 1 sq. bars: fsq. bars: 1 sq. bars: 1 sq. bars: f sq. bars: 2 6 Ig., 3 6 Ig., 4 0 Ig., 5 0 Ig., 56lg., 12 crs. 12 crs. 10 crs. 12 crs. 6 crs. Heel slab 1 sq. bars: f sq. bars: 1 sq. bars: f sq. bars: f sq. bars: 3 6 Ig., 4 9 Ig., 6 0 Ig., 70lg., 8 0 Ig., 12 crs. 12 crs. 12 crs. 10 crs. 5 crs. Vert, wall reinfment. |sq. bars: f sq. bars: 1 sq. bars: 1 sq. bars: 1 sq. bars: 9 0 Ig., 130lg., 210lg., 25 0 Ig., 12 crs. 10 crs. 10 crs. 10 crs. j sq. bars: 7 0 10 crs. 10 sq. bars:ll0lg.,10 crs. A 1 2 1 9 2 4 2 11 35 B 1 4 1 6 1 8 1 10 2 0 C 1 4 1 6 1 n 2 5J 3 Hi D 2 3 3 2 4 1 1 4 Hi 5 10 E 4 9 6 5 8 2r 10 4 12 4i Lb
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