374. - The contractor shall visit the site of the building and examine for himself the condition of the lot, and satisfy himself as to the nature of the soil.
[Where this is not practicable the architect should show the present grade of lot by red lines on the elevation drawings, and the nature of the soils should be determined by borings or test pits. See Section 4.]
Excavate to the depth shown by the drawings for the cellar, areas, coal vault and outside entrance, and for trenches under all walls and piers. All trenches shall be excavated to the neat size as far as practicable, and each shall be leveled to a line on the bottom, ready to receive the foundation. This contractor must be careful not to excavate the trenches below the depth shown by the drawings; should he do so he must pay the mason for the extra mason work thereby made necessary, as under no condition will dirt filling be allowed.
All excavations to be kept at least (12) inches outside the outer face of walls. (See Section 31.)
[Excavations for drains, dry wells, furnace pit, air ducts, etc., to be specified here if required.]
Water. - Should water be encountered in making the excavations, this contractor is to keep it pumped out of the way until the footings are set, unless practicable to drain into sewer.
Stone. - Should a solid ledge be encountered in the excavations, this contractor is to remove the same by blasting or other process, and is to pile the stone where directed on the lot (if suitable for foundation). For removing such stonework an extra sum of (---------cents) per cubic foot of stone excavation will be paid, but no extra payment will be made for removing boulders or loose stones.
Remove from the premises as soon as excavated all material except the loam and such as may be needed for filling about the walls (or grading).
Filling. - When directed by the architect, this contractor shall fill about the walls (with stone, gravel or sand) to within (3) feet (half their height) of the finished grade, and as soon as the first floor joist are set he shall complete the filling to the grade line, tamping the earth solidly every 6 inches. (See Section 87.)
Grading. - Grade the surface of the lot to the level indicated by the drawings (using the loam first removed) and leave in good condition for top dressing (or paving.) (Foundations for walks and driveways.)
[When building on a site formerly occupied by a building, or covered with rubbish, the specifications should provide for the removal of all rubbish, debris, old foundation stone, sidewalk stone and other materials that cannot be used in the new building.]