UL 32:2004 pdf download – Metal Waste Cans.
5.7 Strip steel used for legs and reinforcements shall be painted or plated to retard corrosion.
6 Seams and Joints
6.1 All seams or joints in the bottom and in the body shall be welded, brazed, or seamed and shall not depend on soft solder alone for strength.
6.2 Acceptable types of formed seams are illustrated In Figures 4.1. 4.2. and 4.3.
6.3 Formed seams shall be not less than 1/4 inch (6.4 mm) in width and shall have a metal overlap of not less than 1/8 inch (3.2 mm).
6.4 The bottom and the lower 6 inches (152 mm) of the body shall prevent oil leakage. lithe bottom and vertical body joints are formed seams, they shall be sweated and soldered unless the can is galvanized after forming.
7 RIvets and Spot Welds
7.1 A rivet shall have a sharn oiameter of not less than 1,8 inch t3.2 mmj, ano shall not be headed over against sheet metal. If a can is galvanized after forming, an uncoated rivet may be used.
7.2 A rivet shall have a close fit in the rivet hole.
7.3 The head of a rivet on the inside of a waste can within 6 inches (152 mm) of the bottom shall be sweated with solder unless the can is galvanized after the rivet is installed.
7.4 When spot welding is used for the attachment of any part, at least twice the number of welds shall be used as is required for a rivet. Spot welding shall not bum through sheet metal.
8 Body Reinforcements
8.1 The upper edge of the body shall be reinforced by hemming. rolling, wiring, or by some other method that provides stiffness.
8.2 If a waste can is supported by a sheet metal base, the bottom edge of the base shall be reinforced as required for the upper edge of the body.
10 Cover Reinforcements
10.1 The movable section of a two-piece cover shall be formed o reinforced in a manner to provide stiffness to resist deformation as a result of rough handling and to maintain a close fit with the body.
10.2 A flanged rim of a cover shall be hemmed, rolled, wired, or stiffened unless the cover is of metal
0.006 inch (0.15 mm) thicker than that specified in Table 5.1. The edge of the rim shall be smooth and
finished without sharp corners. See 9.4.
10.3 A one•piece cover shall resist flexing. This may be accomplished by the use of separate reinforcing members or by stamping the cover in such a form that will provide the stiffness indicated in 10.1.
10.4 The movable section of a two-piece cover shall be reinforced by strip steel having a cross-sectional area of not less than 0.109 square Inch (0.70 cm2), placed on the center line of the cover at right angles to the hinged edge. See Figures 4.1. 4.2, and 4.3. This reinforcement may be bent up at its outer end at an angle of about 45 degrees to serve as a carrying handle, and the inner end may be bent up to limit the angle of opening.
10.5 The movable section of a two-piece cover shall be further reinforced by two strips of steel, each having a cross-sectional area of not less than 0.093 square inch (0.60 cm2), unless that section is so formed or otherwise constructed that the stillness is provided. These reinforcing members may be attached to the inside or outside of the cover and shall be placed at an angle of approximately 45 degrees with the center reinforcing member or at right angles to that member.
10.6 Sheet metal, at each point of attachment of the cover stop, shall be reinforced with steel over an area not less than the square of the width of the stop, but not less than 1 square inch (6.45 cm2). Each reinforcement shall have a thickness of not less than one-hall the diameter of the shank of holding rivets, but not less than 1/16 inch (1.6 mm). Where a stop strikes the sheet metal. it shall be reinforced to prevent deformation or injury to the coating.
10.7 The hinged edge of the ngid section of a two-piece cover shall be reinforced by a length of strip steel having a cross-sectional area of not less than 0.109 square inch (0.70 cm2) or the edge may be turned down and hemmed, rolled, or wired.
10.8 Each reinforcing strip shall be attached by not less than two rivets spaced not more than 6 inches (152 mm) on centers and not more than 1 inch (25.4 mm) from the ends. See 7.4.