Floor Diaphragm Nailing

Of importance is the in plane rigidity of the diaphragm.

Floor diaphragm nailing. The term diaphragm is usually applied to roofs and floors. Sturd i floor can be manufactured with square edges or with tongue and groove edges. In this post i ll provide some background on i joist diaphragms and detailed information on the use of. Sturd i floor is designed to be used with the apa glued floor system which uses an adhesive in addition to nails to help eliminate squeaks and nail popping as well as increase floor stiffness.

Above which increased nailing will not increase capacity. Demands on prefabricated wood i joists in engineered buildings extend to more than just gravity requirements. It can occur when there are gaps between the floor diaphragm and the supporting joists and when no glue has been used or when joists are supported by metal hangers. Diaphragm boundaryedge nailing or interior panel edge nail spacing.

In addition the maximum loads for which a blocked diaphragm can be designed are many times greater than those for diaphragms without blocking. Similar changes to 2306 3 for shear walls. Use the interior panel edge nail spacing not the diaphragm boundary nail spacing to calculate ga. Tji joists as engineered diaphragm framing members.

These construction systems can be used when designing a building for lateral loads such as those generated by wind or earthquakes. A diaphragm is a flat structural unit acting like a deep thin beam. 6 significant changes to 2012 ibc 2009 2012 sdpws 7 diaphragm types. When tji 110 210 and 230 joists are used in floor diaphragm construction the thickness of the sheathing must be a minimum of 19 32 fastened with 8d 0 131 x 2 nails.

Bending shear nail slip chord connection slip totalδ δb δv. Seismic and wind lateral forces induce diaphragm shear interactions that the engineer of record needs to evaluate when specifying i joists in light framed diaphragm applications. It can also be exacerbated by the use of wood products having a high glue content that do not allow the nail to grip the wood. To control squeak all nonbedded nails sometimes.

Flexible frames rigid walls an important characteristic of diaphragms is flexibility or its opposite rigidity. What nail spacing do you use to calculate en. If you look at the test data summary in table c4 4 2e it matches up reasonably well with this approach. In seismic design rigidity means relative rigidity.

A shear wall however is a vertical cantilevered diaphragm.