Solid Laminated Roof Diaphragm

Tall wood buildings like t3 minneapolis have used nlt as floor and roof panels atop glulam beams.

Solid laminated roof diaphragm. Or thicker or laminated decking. Irc table r803 1 lists 1 1 2 t g for rafter spans up to 72. Nlt nail laminated timber is a mass timber panel system which can be used for floor wall and roof structures. Asce 7 american society of civil engineers.

A diaphragm is a flat structural unit acting like a deep thin beam. It is designed of two to five strips of kiln dried wood glued with an exterior waterproof adhesive to form a glulam roof decking. The term diaphragm is usually applied to roofs and floors. The ibc icc 2003a and the af pa 2005 permit wood structural panel diaphragm sheathing to be fastened over solid lumber planking or laminated decking using full tabulated values for new construction.

Goodfellow also offers solid wood decking species in red pine red cedar spruce and larch. Buildings that have primary wood frames with no lateral rigidity columns simply supported at top and bottom depend entirely on the diaphragm shear wall system for. Just wondering if anyone has used this decking to act as the roof diaphragm. These construction systems can be used when designing a building for lateral loads such as those generated by wind or earthquakes.

Nail laminated timber nlt. Inherent is the assumption that the sheathing nail will have a penetration of not less than 10 diameters. I am looking to space rafters at 72 however i cannot find any information on diaphragm strength of the t g decking. The roof diaphragm functions as a horizontal medium through which lateral forces are collected and redistributed to each participating vertical element wood frame shear walls.

Decking is also available in laminated wood. A shear wall however is a vertical cantilevered diaphragm. Design and detailing of plywood floor and roof diaphragms. Minimum design loads for.

This project features a free form solid laminated wood roof site fabricated with 2 x 6 lumber in six foot wide panels and supported by 93 milled glulam columns and a two way cable truss system. The entire solid non glazed area of the exterior walls has plywood sheathing but only a. Application of elastomeric adhesives to the tongue and groove joints between solid or laminated timber decking can greatly increase the strength and stiffness of roof diaphragms 35 72.