Side
af
764
Forrige
Næste
108 Molesworth’s pocket-book
Table op Culverts for Railways.
Diameter. Thickness of Clear height inside. Cube yds. in 1 lineal yd. of culvert.
Arch. Invert. Skies.
ft. in. ft. in. ft. in. ft in. ft. in.
1 6 0 9 Barrel. 0-60
2 0 0 9 Barrel. 0-75
Brickwork,. 3 0 0 9 0 9 1 2 3 3 1-60
4 0 I 2 0 9 1 6 4 6 3'30
5 0 1 2 0 9 1 10 5 6 4-70
6 0 1 6 0 9 2 3 6 6 6’10
Rubble ma- r flat fl 6 0 6 1 0 1 6 2 6 1-50
sonry with top 1 2 0 0 9 1 0 2 0 3 0 2-00
hammer- < 3 0 1 0 0 9 2 6 3 3 4'00
dressed I 5 0 1 0 1 0 3 0 5 6 6-70
arches ,. 1 6 0 1 4 1 0 3 6 6 6 7-60
Table of the Thickness reqütbed fok the Crowns of
Akches. (Hurst.)
Radius of 1 Curvature. Stone Arches. Brick Arches. 1 lladius of Curvature. Stone Arches. Brink Arches. Radius of I Curvature. Stone Arches. Brick Arches.
feet. feet. feet. feet. feet. feet. feet. feet. feet.
2 •42 •56 14 1-12 1-50 60 2'33 3-10
2i •47 •63 15 1-16 1-55 65 2'42 3’22
3 •52 •69 16 1-20 1-60 70 2-51 3-35
3; •56 • 75 IT 1*24 1-65 75 2-60 3’46
4 •60 •80 18 1-27 1-70 80 2'68 3'58
4| •64 ■85 19 1’32 1-U 85 2-77 3'69
5 •67 •90 20 1’34 1-79 90 2-85 3’80
5| •71 •94 22 1-41 1’88 95 2-;i2 3-90
6 •14 •98 24 1-47 1’96 100 3-00 4-00
1 •80 1-06 25 1’50 2*00 no 3-15 4-20
8 •85 1'13 30 1-64 2-19 120 3'29 4-38
• 9 •90 1-20 35 1-78 2’37 130 3-42 4-56
10 •95 1-26 40 1-90 2’53 140 3-35 4-73
IT 1-00 133 45 2-01 2-68 150 3-67 4-90
12 1-04 1-38 50 2-12 2-83 ! 160 3-80 5-06
13 1-08 1’44 55 2’22 2-97 1 170 4-18 5-58