A-A-52511 Trucks, Dolly, Rectangular, With 4 Swivel Casters (General Purpose And Machinery) (Metric)This CID covers requirements for general purpose and machinery dolly trucks with rectangular frames and four swivel casters. General purpose dolly trucks are intended for moving loads, not exceeding 454 kilograms (kg) (1000 pounds), over short distances on paved surfaces. Machinery dolly trucks are intended for use singularily or in pairs for moving machinery and other bulky loads, not exceeding 1089 kg (2400 pounds) per truck. over short distances on paved surfaces.

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A-A-52511

2.2 Design and construction. The dolly trucks shall consist of a rectangular frame and four swivel casters as shown in figure 1. The type II dolly trucks shall have two platform boards attached to the frame. Frame material shall be wood or steel for type I dolly trucks and steel for type II. Steel frames shall be of an all welded construction. The capacities and sizes of the trucks shall be as shown in table I.

FIGURE 1. Dolly trucks.

TABLE I. Capacities and sizes.

Type	Width and length (mm)	Maximum height to top of frame (mm)	Rated capacity (kg)
I	610 X 762	203	454
II	457 X 610	203	1089

2.2.1 Casters. The casters shall be securely attached to the underside of the frame, each located as close as practicable to each of the four corners. If corners are rounded, the caster mounting plate shall be rounded concentrically or flush with the frame. The swivel casters shall be capable of fully swiveling with dolly trucks loaded to rated capacity. Caster size shall be fully compatible with the rated capacity of the dolly truck.

2.2.2 Type II dolly truck platforms. Each platform board shall be not less than 20.6 mm (13/16 inch) thick and 190.5 mm (7-1/2 inches) wide. Lengths shall be as required for the ends to fit flush with the 610 mm (24-inch) sides of the frame. Each board shall be securely fastened to the frame. Fastening devices shall not protrude above the board top surfaces.