UL 1678-2012 pdf download
UL 1678-2012 pdf download.Household, Commercial, and Institutional-UseCarts,Stands and Entertainment Centers for Use with Audio and/or Video Equipment.
17 Loading Tests
17.1 The cart, stand or entertainment center shall be constructed so that there is no collapse or permanent damage that results in a risk of injury to persons when the supporting surfaces are loaded as specified in 17.2 followed by 17.3.
17.2 Method I — A cart, stand or entertainment center shall be constructed so that there is no collapse or permanent damage that results in a risk of iniury to persons when each supporting surface is individually loaded with:
a) Two times the load specified in Table 14,1 plus 100 lbs. (45 kg) for the television shelf or mounting surface;
b) Four times the load specified in Table 14.1, not to exceed 100 pounds (45 kg) for all other supporting surfaces; or
C) The maximum intended load for a dedicated storage area intended to accommodate a specific accessory.
17.3 Method II — All supporting surfaces are to be loaded with the weight specified in Table 14.1 so that the cart, stand or entertainment center is supporting the total specified load(s) for the cart, stand or entertainment center. The load(s) shall remain in place for one minute. The load(s) shall be uniformly applied to each supporting surface.
18 Handle Strength Test
Seclion I B elleclive January 31. 2014
18.1 When tested as described in 18.2 and 18.3. a handle shall not break nor shall there be any breakage of the securing means, including that portion of the cart, stand or entertainment center to which the handle is attached. Refer to the definition of Handle, 2.9.
18.2 A cart, stand or entertainment center handle shall simultaneously withstand a force of twice the combined weight of the cart, stand or entertainment center and the weight of each supporting surface loaded with the weight specified in Table 14.1.
18.3 The load is to be uniformly applied without clamping over a 3-inch (7.6-cm) width at the center of the handle. The load is to be started at zero and gradually increased so that the total testing value is attained within 5 — 10 seconds and then maintained for a period of one minute. If more than one handle is furnished on the product, the force is to be distributed between the handles. The distribution of forces is to be determined by measuring the percentage of the product weight sustained by each handle, with the product in the intended position for movement, If a product is furnished with more than one handle and can be moved by only one handle, each handle shall be capable of sustaining the total test load. The test load is to be applied in both the horizontal and vertical directions.
19.1 A cart, stand or entertainment center shall be constructed such that deformation or damage does not result in a risk of injury to persons when each appurtenance (such as a shell, drawer, or door) that is located with 30 inches (76.20 cm) of the floor is separately loaded with a force of 50 IbI (222 N) applied in the downward direction for one minute. The force shall be applied:
a) With the appurtenances in the position that results in the maximum stress in the appurtenance: and
b) At a point on the appurtenance which will produce the most severe results.
19.2 To determine comp’iance with 19,1, the cart, stand or entertainment center is to be stabilized to prevent tip-over and the force is to be applied through the end of a 2-inch (50.8-mm) diameter right circular cylinder. The force is to be applied to any appurtenance that is within 30 inches (762 mm) of the floor and is likely to support part or all of a child’s weight.
20 Glass Parts — Impact Test
Section 20 et?ectwe January 31. 2014
20.1 Structural glass parts shall comply with the Impact Test, 20.2. Any gLass part relied on for the cart, stand or entertainment center to comply with the requirements in this standard Is to be evaluated as a structural glass part. A decorative glass part having an area greater than 1 ft2 (0.093 rn2) or having a major dimension greater than 18 inches (457 mm), shall not be b-oken, shattered (totally or in part), or displaced when tested as described In 20.2. A decorative glass part is any glass part not determined to be a structural part.
Exception: Tempered glass parts that comply with the requirements in the Standard Performance Specifications and Methods of Test for Safety Glazing Malerial Used in Bu,$dings, ANSI Z97. 1. Class A are not required to comply with the Impact Test.
20.2 A decorative glass part shall withstand a single impact of 2.5 ft-lbf (3.39 Nm). The impact shall be applied as described in 20.1 to any area of the gLass, except the edge.
