Concrete footing and foundation wall system for accurate on-site fittings to manufactured buildings

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
1 illustrates a foundation system embodiment of the present invention, referred to herein by the general reference numeral 10.
A manufactured building 12 is delivered to a job site and is placed in its desired finished position both in plan and elevation.
Hydraulic jacks, for example, are used to level the building 12, and the standard piers suggested by the building manufacturer are placed under the building's transporter beams and any marriage wall when multiple sections are involved.
There will typically be two full-length transporter beams per section that are ordinarily the only structural members supported by the manufacturer's suggested foundation installation.
The perimeter support is usually quite poor.
The present invention adds perimeter support all around the building 12 on which will bear the outside wall loads.
The vertical distance from the ground to the underside of the floor joints preferably does not exceed thirty-six inches (three feet) at any point.
Ventilation and access openings in the foundation boundary are roughed-in according to local building codes along the building perimeter.
Such are not shown in FIG.
1 in order to show a fully contiguous foundation system.
The foundation system installation begins by checking that the frame of the building is level across three points along each transporter beam, and leveling as necessary.
The ground surface is cut and stepped in level segments where it would otherwise exceed a slope of more than one foot in ten feet along the foundation boundary line overshadowed by the building perimeter rim.
In locations that are frost free, the concrete footings for a perimeter foundation and the pads for the internal field piers can lay directly on the surface of the ground.
In areas were ground frost is a problem, at least the perimeter foundation must be trenched down to below the frost line so that the concrete footings will not heave and shift during expected winter conditions