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At a point 3 feet from the building, dig a trench 6 inches wide and
18 inches deep—the length of this trench to be 2 feet greater than
the width of the doorway of the building. From the edge of the trench
nearest to the building, dig away the earth between trench and building
to a depth of 1 foot, and place here, to a depth of 6 inches, a fill
of either coarse gravel or crushed rock. Do not, however, place any of
this gravel fill in the trench. Mix concrete 1: 2½: 5, and lay same,
first in the trench, and then on top of the gravel fill; sloping the
surface so that it just meets the floor level at the doorway. Before
the concrete has had time to set, provide a runway slot for the sliding
doors—or better, build little guides or humps with the concrete,
to hold the doors in position. If the doors happen to be swinging
ones, place a gas pipe or iron socket in the soft concrete, for a
“shove-fastener.”
Note the concrete curb on the right of entrance door. This prevents the
gravel that surrounds the building from washing down onto the approach
and getting in the way of the doors. To build this curb, use 1-inch
planks placed on top of the concrete floor, to serve as forms to hold
concrete in place.
=Materials Required=
One cubic yard of crushed stone or screened gravel;
2½ cubic yards of sand;
5 bags of Portland cement.
This entrance floor was constructed in half a day, by one man.
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