The Stability of Arches
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Weight and Strength of Arch Materials.
Weight per Cub. Ft.
Values o( s„ Lb.
lb./ft.2 Masonry : Sandstone or Limestone .
135 to 150 40,000 to 60,000 Granite ....
165 100,000 Brick ....
120 30,000 to 40,000 Concrete ....
140 50,000 to 80,000 Reinforced Concrete 150 — Gravel and Earth .
90 to 120 — (121) 122 THE STABILITY OF AECHBS 63. Dead Load. — The dead load consists of the weight of the arch itself and the filling, etc., which it carries. The following are the average weights for the material...s involved :— The height of the filling over the extrados at the crown may be taken for railway arches as ft.
P and for highway arches as — ft.
P where p is the density of the material in lb. per cub.
foot.
Average Permanent Load on Boad Bridges.
Iron road bridges : — Timber platform and ballast . 100 Ib./ft.M ,„. ,, ,,, „ Cross girders . . . . 20 „ / = ^''" '"■'"• Iron bridges with brick arches : — Arches 48 lb."!
Concrete and asphalt . . . 42 „ I oi n ii, lu 2 Metalling 100 „ f = ^^" '"■'"• Cross girders 20 „ J 64.
What to read after The Stability of Arches?
You can find similar books in the "Read Also" column, or choose other free books by Sprague, Ernest H. (Ernest Headly) to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Weight and Strength of Arch Materials.
Weight per Cub. Ft.
Values o( s„ Lb.
lb./ft.2 Masonry : Sandstone or Limestone .
135 to 150 40,000 to 60,000 Granite ....
165 100,000 Brick ....
120 30,000 to 40,000 Concrete ....
140 50,000 to 80,000 Reinforced Concrete 150 — Gravel and Earth .
90 to 120 — (121) 122 THE STABILITY OF AECHBS 63. Dead Load. — The dead load consists of the weight of the arch itself and the filling, etc., which it carries. The following are the average weights for the material...s involved :— The height of the filling over the extrados at the crown may be taken for railway arches as ft.
P and for highway arches as — ft.
P where p is the density of the material in lb. per cub.
foot.
Average Permanent Load on Boad Bridges.
Iron road bridges : — Timber platform and ballast . 100 Ib./ft.M ,„. ,, ,,, „ Cross girders . . . . 20 „ / = ^''" '"■'"• Iron bridges with brick arches : — Arches 48 lb."!
Concrete and asphalt . . . 42 „ I oi n ii, lu 2 Metalling 100 „ f = ^^" '"■'"• Cross girders 20 „ J 64.
What to read after The Stability of Arches?
You can find similar books in the "Read Also" column, or choose other free books by Sprague, Ernest H. (Ernest Headly) to read onlineMoreLess
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