GA 234-2008 CONTROL JOINTS FOR FIRE-RESISTANCE RATED SYSTEMS《防火分级系统用控制接头》.pdf

1、GA-234-08 Copyright 2008 Gypsum Association. All right reserved. Printed in U.S.A. GYPSUM ASSOCIATION 810 FIRST STREET NE, #510 WASHINGTON, DC 20002 CONTROL JOINTS FOR FIRE-RESISTANCE RATED SYSTEMS (GA-234-08)Control joints in gypsum panel product systems shall be installed where indicated on the pl

2、ans or specifications. Gypsum Association recommended specifications and manufacturers recommendations specify minimum requirements for the installation of control joints. Control joints in the gypsum board systems shall be specified by the architect or designer where any of the conditions listed be

3、low exist. 1. A partition, wall, or ceiling traverses a construction joint (expansion, seismic, or building control element) in the base building structure. 2. Where a wall or partition runs in an uninterrupted straight plane exceeding 30 ft (9 m) in length and total area between control joints does

4、 not exceed 900 ft2(81 m2). NOTE: Full height door frames may be considered a control joint. 3. Interior Ceilings With Perimeter Relief: Control joints shall be installed so that linear dimensions between control joints shall not exceed 50 ft (15 m) and total area between control joints does not exc

5、eed 2500 ft2(225 m2). 4. Interior Ceilings Without Perimeter Relief: Control joints shall be installed so that linear dimensions between control joints shall not exceed 30 ft (9 m) and total area between control joints does not exceed 900 ft2(81 m2). 5. Exterior Ceilings and Soffits: Control joints

6、shall be installed so that linear dimensions between control joints shall not exceed 30 ft (9 m) and total area between control joints does not exceed 900 ft2(81 m2). 6. A control joint or intermediate blocking shall be installed where ceiling framing members change direction. 7. A control joint is

7、desired or incorporated as a design accent or architectural feature. The methods shown for protecting control joints in 1-hour floor-ceiling systems, either direct-attached, furred, or suspended, are applicable to all 1-hour floor ceiling systems with either wood or metal framing including, but not

8、limited to, dimension lumber, wood trusses, wood I- beams, steel bar joists, and steel channel joists. Individual gypsum board strips applied behind control joints in ceiling systems shall be not less than the shorter of 48 in. (1200 mm) or the length of the control joint. 1-HOUR NONCOMBUSTIBLE (WHI

9、647-3024, 9-20-90) This document may be revised or withdrawn from circulation at any time. The status of the document should be verified by the user prior to following any recommendations contained herein. To verify that you have the most current edition of the document, access the Gypsum Associati

10、on website at: www.gypsum.org. 1-HOUR WALL & PARTITION SYSTEMS 1-HOUR WOOD FRAMED (WHI-647-3024, 9-20-90) GA-234-08 Copyright 2008 Gypsum Association. All right reserved. Printed in U.S.A. 2-HOUR WALL & PARTITION SYSTEMS 2-HOUR NONCOMBUSTIBLE (WHI-651-0318.1, 3-20-90) 1-HOUR FLOOR-CEILING SYSTEM WIT

11、H SUSPENDED CEILING (UL R4024, 96NK13566, 7-29-96) 2-HOUR WOOD FRAMED (WHI-647-3024, 9-20-90) 1-HOUR WOOD FRAMED FLOOR-CEILING SYSTEMS CONTROL JOINT PARALLEL TO FRAMING WITH DIRECT-ATTACHED CEILING (UL R4024, 97NK13566, 7-29-96) CONTROL JOINT PARALLEL TO FRAMING WITH FURRED CEILING (UL R4024, 97NK2136, 2-7-97) CONTROL JOINT PERPENDICULAR TO FRAMING WITH FURRED CEILING (UL R4024, 96NK13566, 7-29-96)