公开(公告)号：US20180087270A1

公开(公告)日：2018-03-29

申请号：US15466612

申请日：2017-03-22

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Gary Franklin MILLER ,  Joseph Edward SWINEA ,  Naveen PUNATI

IPC: E04B9/04 ,  E04B1/76 ,  E04B1/26 ,  E04B9/00 ,  E04B1/94

CPC classification number: E04B9/04 ,  C04B20/06 ,  C04B28/14 ,  E04B1/26 ,  E04B1/7654 ,  E04B1/94 ,  E04B1/945 ,  E04B9/001 ,  E04B9/225 ,  E04C3/16

Abstract: A combined wooden frame support and ceiling system is provided, each support including upper and lower wooden chords and a wooden structure connecting the lower chord to the upper chord for weight bearing purposes. A gypsum wallboard batten strip is attached to the lower chord, and defining a ledge extending from each side of the lower chord. A single thickness of gypsum wallboard panels is used to create a ceiling attached to the support, each panel used to create the ceiling is made from a slurry composition including less than 5% by weight of Grade 4 vermiculite. Upon the support being assembled in the ceiling system, with a plurality of the supports, and having lengths of insulation supported by the ledges of the adjacent supports, the ceiling system resists charring by fire for at least one hour.