L 美国保险商实验室 aUL-2442-BULLETINS-2006.pdf
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1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subjects 2442 (1678) (In reply, refer to Subject 2442)March 28, 2006 SUMMARY OF TOPICS The following changes in requirements are being proposed: 1. For Preliminary Review: The Proposed First Edition of the Standard for Wall- and Ceiling-M
2、ounts and Accessories COMMENTS DUE: April 27, 2006 For your convenience in review, proposed additions to existing requirements as discussed and agreed to during the last 2442 STP Meeting are shown underlined and proposed deletions are shown lined-out. 1. For Preliminary Review: The Proposed First Ed
3、ition of the Standard for Wall- and Ceiling-Mounts and Accessories BACKGROUND/RATIONALE The Proposed First Edition (PFE) of UL 2442 is intended to cover shelves, brackets, and similar structures, referred to in the Standard as wall and ceiling mounts, that provide structural support for the mounting
4、 of audio/video equipment, information technology equipment, and similar products, to the wall or ceiling of a residential or commercial building. Currently, these products are covered by the Standard for Household, Commercial, and Professional-Use Carts and Stands for Use With Audio/Video Equipment
5、, UL 1678. However, UL had determined that a stand alone standard would better serve to cover these products and proposed UL 2442. UL subsequently held a meeting of the 2442 STP to discuss and resolve comments received on the proposed Standard. Working Groups were formed at the meeting to address se
6、veral issues that required further consideration and collaboration. All but one of the Working Groups provided recommendations for revised requirements. UL has now incorporated all of the input received and is asking STP members to conduct another preliminary review of the standard before balloting
7、takes place. Please note that there is still outstanding work to be done concerning the installation of these mounts as the Mount Installation Working Group did not complete its assignment. It is ULs intent to revisit this issue during this review period and if necessary, to form another Working Gro
8、up. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/21/2006 20:04:58 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIB
9、UTION CONTENTS INTRODUCTION 1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 3 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 4 Units of Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . .
11、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 5 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 CONSTRUCTION 6 General . . . . . . . . . . . . . . . . . .
12、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 7 Corrosion Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 8 Sharp Edges . . . .
13、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 9 Securement of Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 10 Venti
14、lation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 11 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15、 . . . . . . . . . .6 12 User/Installer Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 PERFORMANCE 13 General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16、. . . . . . . . . . . . . . . . . . . .7 14 Temperature Stability Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 15 Normal Loading Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17、. . . . . . . . . . . . . . . . . . . . .12 16 Mounting Securement Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 16A Tip Stability Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、 . . . . . . . . . . . . . . . . . . . . . .13 17 Impact Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 18 Glass Parts Impact Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19、 . . . . . . . . . . . . . . . . . . . . . . . . . .13 19 Adhesive Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 20 Sharp Edge Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 MARKINGS 21 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 22 Identifying Information . . . . . . . . . . . . . . .
21、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 23 Factory Identifi cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 24 Supporting Surface Load Marking . . . . .
22、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 25 Installation and Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 APPENDIX A Standards for Components. . . . . . . . . . . . .
23、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A20 MARCH 28, 2006SUBJECT 2442-2- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/21/2006 20:04:58 MDT
24、No reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION INTRODUCTION 1 Scope 1.1 These requirements apply to shelves, brackets, and similar structures, herein referred to as wall and ceiling mounts, that provide structural
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