• Subject to loading detail, suspension should not exceed 1200mm centres
• The suspension must not be out of plumb (vertical) more than 25mm for each 150mm of plenum depth and in no case should exceed 500mm to a 3000mm depth
• Whenever the above is exceeded and/or when the hanger suspension is more than 2000mm long, then a sub grid is recommended. Should suspension be vertical, then a 4200mm drop would be acceptable using hanger strap
• In no case should suspension be from other services in the ceiling void
• A hanger suspension point within 400mm from the wall angle or shadow moulding must be installed on main tees and cross tees
• Two steel pop rivets with a shear strength three times that of the maximum allowed ceiling load is to be used
• When securing wire to tee, it should be wound tightly around itself at least three times
• Should the ceiling mass exceed 20kg/m2, a sub grid is required and a consulting engineer should recommend suitable suspension

Application

• Used in Gyproc ceiling systems to give increased fire protection

Board color