Table XI. Safe Bearing Loads

Brick and Stone Masonry.

Lb. per Sq. In.

Brickwork.

Bricks, hard, laid in lime mortar...................

100

Hard, laid in Portland cement mortar..........

200

Hard, laid in Rosendale cement mortar.......

150

Masonry.

Granite, capstone.............................................

700

Squared stonework......................................

860

Sandstone, captone................................

350

Squared stonework ......................................

175

Rubble stonework, laid in lime mortar ......

80

Rubble stonework, laid in cement mortar

150

Limestone, capstone.........................................

600

Squared stonework................................

250

Rubble, laid in lime mortar

80

Rubble, laid in cement mortar......................

150

Concrete, 1 Portland, 2 sand, 5 broken stone

150

Foundation Soils.

Tons per Sq. Ft.

Rock, hardest in native bed........................................

100 -

Equal to best ashlar masonry................

25-40

Equal to best brick....................

15-20

Clay, dry, in thick beds.....................

4- 6

Moderately dry, in thick beds.................

2- 4

Soft...............................................................

1- 2

Gravel and coarse sand, well cemented..........

8-10

Sand, compact and well cemented ................

4- 6

Clean, dry...........................

2- 4

Quicksand, alluvial soils, etc.......................

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