Solid Laminated Roof Diaphragm

Construction adhesives for field gluing plywood to wood framing must meet minimum performance standards specified in astm d 3498 10. Tall wood buildings like t3 minneapolis have used nlt as floor and roof panels atop glulam beams. Just wondering if anyone has used this decking to act as the roof diaphragm.

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Decking is also available in laminated wood.

Solid laminated roof diaphragm.

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. Does anyone have experience using tongue and groove decking for roof sheathing. Design and detailing of plywood floor and roof diaphragms.

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. 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. 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. 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. Nail laminated timber nlt. Irc table r803 1 lists 1 1 2 t g for rafter spans up to 72.

Goodfellow also offers solid wood decking species in red pine red cedar spruce and larch. A diaphragm is a flat structural unit acting like a deep thin beam. The entire solid non glazed area of the exterior walls has plywood sheathing but only a. Asce 7 american society of civil engineers.

A custom steel sculpted universal connector at the top of the glulam support columns was developed to accommodate the constantly varying roof geometry. Minimum design loads for. Nlt nail laminated timber is a mass timber panel system which can be used for floor wall and roof structures. 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.

Or thicker or laminated decking. A shear wall however is a vertical cantilevered 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.