Roof Diaphragm Deflection

The thoracic diaphragm or simply the diaphragm ancient greek.

Roof diaphragm deflection.

9 0 purlin spacing w14x26 af 2 1 sqin 7 welds per sheet vsc 12. What is the deflection equation for open front cantilever diaphragms. If framing members are spaced more than 24 o c testing indicates further deflection increase of about 20 or 3 times the deflection of a comparable blocked diaphragm. There will also be slip.

Asce 7 16 figure 12 3 1. How is diaphragm flexibility defined for open front cantilever diaphragms vs. R 1 3 diaphragm span. L 42 diaphragm depth.

The roof diaphragm will take load from half the wall below and load directly applied to the diaphragm. The deck will have deflection similar to typical beam deflection. Applies to both floor and roof diaphragms. Also because the diaphragm beam is deep relative to its span it will also have shear deflection.

1 1 2 x 18 ga deck vercor. Sheathing materials and unblocked wood structural panel diaphragms. Partition is a sheet of internal skeletal muscle in humans and other mammals that extends across the bottom of the thoracic cavity the diaphragm separates the thoracic cavity containing the heart and lungs from the abdominal cavity and performs an important function in. However sdpws provides an option to calculate deflections using other methods such as the four term equations.

Diaphragms and shear walls. I could use some help on a calculation done for flexible diaphragm deflection. 13 5 l x 16 9 x l 13 5 18 ft 16 9 6 ft 24 14 4 psf. The term diaphragm is usually applied to roofs and floors.

The maximum roof diaphragm moment m equals ww wl x l2 8. W 612 plf. To analyze the deflection of diaphragms bending shear and slip must be accounted for. The corresponding diaphragm chord forces are therefore equal to m divided by the diaphragm depth b.

A shear wall however is a vertical cantilevered diaphragm. What is the total diaphragm deflection. The maximum unit shear on the wall diaphragm is also equal to the roof reaction r divided by b. There will also be slip.

A diaphragm is a flat structural unit acting like a deep thin beam. This is based on limited testing of the diaphragm by apa. D 56 uniform load. What are the available methods of distributing torsional forces into the diaphragm.

The sdpws three term deflection equations are an algebraic simplification of the four term equations in the ibc. Deflection of unblocked diaphragms is 2 5 times the deflection of blocked diaphragm.