Solid Laminated Roof Diaphragm

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.

Solid laminated roof diaphragm.

The entire solid non glazed area of the exterior walls has plywood sheathing but only a. 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. A diaphragm is a flat structural unit acting like a deep thin beam. A custom steel sculpted universal connector at the top of the glulam support columns was developed to accommodate the constantly varying roof geometry.

Tall wood buildings like t3 minneapolis have used nlt as floor and roof panels atop glulam beams. Design and detailing of plywood floor and roof diaphragms. Or thicker or laminated decking. Just wondering if anyone has used this decking to act as the roof diaphragm.

Minimum design loads for. Inherent is the assumption that the sheathing nail will have a penetration of not less than 10 diameters. The term diaphragm is usually applied to roofs and floors. Asce 7 american society of civil engineers.

A shear wall however is a vertical cantilevered diaphragm. 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. Nlt nail laminated timber is a mass timber panel system which can be used for floor wall and roof structures.

These construction systems can be used when designing a building for lateral loads such as those generated by wind or earthquakes. 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. Irc table r803 1 lists 1 1 2 t g for rafter spans up to 72. I am looking to space rafters at 72 however i cannot find any information on diaphragm strength of the t g decking.

Does anyone have experience using tongue and groove decking for roof sheathing. 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. Decking is also available in laminated wood.