AA-F-358J
3.3.5 Movable follower block. The follower block shall be as specified
in 3.3.5.1 or 3.3.5.2. Its upper edge shall have a completely closed formation
and all exposed surfaces shall be finished in a manner which completely
eliminates roughness. The follower block shall be easy to adjust and
removable. The follower block control shall be easily accessible when placed
in the farthest back position.
3.3.5.1 Friction locking type. The friction locking type follower block shall be held in place by means of pressure exerted against the drawer sides and shall be held securely in a right angle position to the drawer sides at any point along the drawer depth, except for a maximum of 5 inches at the front of the drawer. The follower block shall be spring controlled and activated at one point near the upper edge of the follower by a device designed for this purpose. The follower block shall withstand the test specified in 4.6.5 without damage or creeping in excess of 1/2 inch.
3.3.5.2 Positive locking type. The positive locking type follower block shall be held in place by engaging slots along the drawer sides or bottom and
shall be held securely in a right angle position to the drawer sides at no greater than 1 inch increments, except for a maximum of 5 inches at the front of the drawer. The locking method shall be such as to prevent disengaging by pressure of filing material in the drawer. When the locking method does not incorporate spring action, the locking shall be accomplished solely by the weight of the follower block. Positive locking followers shall withstand the test in 4.6.5 without damage or disengagement from the secure right angle position to the drawer sides.
3.3.5.3 Follower block support. The follower block support shall be constructed of corrosion resistant material or shall be made corrosion resistant by plating as specified in 3.2.2.3 and 3.2.2.4 or may have an oxide coating with the entire member then coated with an organic finish which dries to a hard film. The support shall be held securely and shall move freely within the formation provided in the drawer side. The support arm extending along the drawer side shall be not more than 5 inches or less than 4-1/2 inches in length.
3.3.6 Drawer suspensions. Drawer suspensions shall be either a side arm type or a cradle type. All welds necessary in the assembly of the suspensions shall provide strong, secure joints and connections. Except for areas burned during welding processes, all surfaces of suspension members shall be cadmium or zinc plated as specified in 3.2.2.3 and 3.2.2.4. A supplementary coating shall be used to cover weld burned areas. Alternatively, an oxide coating may be used with the entire member then coated with an organic finish which dries to a hard film. Suspensions shall be equipped with bumpers of a shock
absorbing material and located so as to prevent metal-to-metal contact between the rear of the suspension and drawer track and the back of the cabinet case. Suspension slides shall travel easily, quietly and smoothly with the drawer. Suspensions shall meet the test requirements in 4.6.1 and 4.6.3.
3.3.6.1 Drawer and case tracks. Case tracks shall be secured to at least the front and rear interior reinforcing members by interlocking of lugs on the case track into appropriate openings in the reinforcing members. The interlocking shall provide secure connections without vertical or horizontal movement. Alternatively, the case track may be attached to the front and rear interior reinforcing members by interlocking lugs, bolts or welding, or any combination thereof, to provide a comparable connection. The drawer track mounting shall be attached to the drawer sides by spot welds. The drawer and case tracks shall be so located as to be level and in proper relation to one another and must hold the drawer squarely in the drawer opening. All outer surfaces of the drawer and case tracks shall be finished in accordance with
3.2.2 and 3.5.
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