USG Exterior Ceiling Applications Systems Guide - Manual (Page 33)

32 USG Exterior Ceiling Applications
Wind Uplift Resistance for Exterior Soffits
USG Drywall Suspension System
USG has a selection of Drywall Suspension assemblies to accommodate the wind loads for most
applications. The system has been tested using applicable industry standards for wind uplift resistance
when installed in exterior soffits and canopies. For more information regarding test standards and online
resources, please refer to the Systems Overview section of this catalogue.
Only S heetroCk ® brand exterior ceiling board, D uroCk ® cement board and S eCuroCk ® Glass Mat Sheathing are
suitable for exterior applications. Specific information for gypsum panel applications can be found at
usg.con and usgdesignstudio.com.
The following pages detail the components and their spacing which are necessary to achieve the different
uplift classifications, including compression post spacing, limiting plenum depths, and construction details for
the installation. The structure that the USG Drywall Suspension System is attached to shall be designed
to withstand the applicable wind loads and carry the soffit system total weight.
Note: Design wind loads vary with geographic region and building conditions, and must be determined by a
professional engineer or architect of record.