Piers –
Safe Loads per square foot
|
Granite
|
30
tons.
|
|
Limestone
|
15 tons.
|
|
Sandstone
|
20 tons.
|
|
Cement
Concrete 1:5
|
15 tons.
|
|
Cement
Concrete 1:10
|
7.5 tons.
|
|
Lime concrete
|
2 to
4 tons.
|
|
Brick
in Mortar
|
3.5 tons.
|
|
Brick
in cement
|
8 to 121 tons.
|
|
Rubble
|
3.5
tons.
|
ANGLES
OF REPOSE FOR VARIOUS MATERIALS
|
Materials
|
Angle
of repose
|
|
Bituminious
coal
|
350
|
|
Anthracite
coal
|
270
|
|
Slaked
coal
|
37.50
to 450
|
|
Ashes
|
400
|
|
Soft Iron
Ore
|
350
|
|
Earth
(Loam)
|
300
to 400
|
|
Sand
(Dry)
|
250
to 350
|
|
Sand (Moist)
|
300
to 450
|
|
Sand
(Wet)
|
150
to 300
|
|
Clay
|
250
to 400
|
|
Gravel
|
300
to 400
|
|
Cinders
|
250
to 400
|
|
Coke
|
300
to 450
|
|
Wheat
|
280
|
|
Maize
|
270
to 300
|
|
Barley
|
270
|
|
Oats
|
280
|
|
Cement
|
170
to 300
|
