Active Standard: C840 - 13
The current standard does not address circumstances where stacking drywall flat is impractical or impossible. Neither does the standard account for the physical toll on workers who are required by the standard to place or retrieve gypsum boards by lifting and bending from floor level rather than waist height. Suppliers in many regions of the U.S. dismiss the current standard as burdensome and continue to stock gypsum boards on edge without any means to prevent boards from toppling. The proposed revision to C840 24.3 would provide an alternate procedure permitting gypsum boards to be stacked on edge when positively secured. USG in the USG Gypsum Handbook addresses the issue of edge stacking as follows: While the vertical stacking of paneled material should be minimized, there are some situations where stacking the board flat creates different safety hazards. For example, in residential construction where rooms are small and hallways narrow, vertically stacking against the wall allows installers to move around the room. Also in residential construction, floor load limits often are not sufficiently high to be able to accommodate a concentrated point load of gypsum panels, cement board or gypsum fiber panels in the center of the floor; instead, the safer procedure in this situation is to distribute the board in vertical stacks around the sides of the room. Sometimes, when different sizes or widths of board are required (for example, 5/8 for the ceiling and 1/2 for the walls) vertical stacking makes it easier for the wallboard hangers to find the board they need. While vertical stacking of panel material can be appropriate and helpful it can also pose a falling hazard. When vertical stacking is used, be sure to leave at least 4 to 6 of space between the bottom of the first board in the stack and the wall. Leaving less than 4 creates a risk that the stack could be pulled over; leaving more than 6 applies too much weight laterally against the wall. Warning tape or signage should be used to alert people of the potential for leaning wallboard to fall if disturbed. ASTM standards are used and cited daily by Code Enforcement Officials who depend on the consensus standards developed by ASTM to perform their duties. The proposed revisions offer a solution that is both practical and safe.
Keywordsceiling; gypsum; wallboard; walls ; Gypsum products--specifications; Installation--gypsum products
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