Roof Diaphragm Aspect Ratio

This is because steeper looks tend to fit more with the golden ratio which all architects work by.

Roof diaphragm aspect ratio.

Wfcm 3 1 3 4c demystifying diaphragm design 20. The corresponding diaphragm chord forces are therefore equal to. Roof slope 1 5 12 12 7 12 roof diaphragms. Maximum length to width ratio of diaphragm panel cast in place concrete 5 1 precast concrete 4 1 metal deck.

Install panels either horizontally or vertically. To be satisfied by the retrofitted structure. 2305 2 3 wood diaphragm aspect ratios. The maximum roof diaphragm moment m equals ww wl x l2 8.

A horizontal diaphragm element parallel and in line with the applied force that collects and transfers diaphragm shear forces to the vertical elements of the lateral force resisting system and or distributes forces within the diaphragm. Min 12 7 and l. 2010 building code of ny 21 masonry 2109 empirical design of masonry 2109 2 lateral stability 2109 2 1 shear walls 2109 2 1 2 maximum diaphragm ratio. For the case study diaphragm with an aspect ratio of 2 1 length to width i e.

The standard galvanized coating is g60 0 6 ounce per square foot. A ratio of 1 1 62 is known as the golden ratio and therefore the vast majority of roof pitch in degrees charts you see will be working to this ratio at the very least. G 40 0 4 ounce per square foot may be specified for greater economy. 2020 existing building code of nys a guidelines for the seismic retrofit of existing buildings a404 prescriptive measures for weak story.

Diaphragm aspect ratio l w is less than 0 67 where w is the diaphragm dimension parallel to the soft weak. With uniform load applied perpendicular to the longitudinal direction the analysis results showed that the tension force in the longitudinal chord member at one quarter of the width from the end chord in tension was about 10 of that in the end chord fo. Heavier galvanized finishes than g 90 can be specified for more severe environmental conditions and exposures. For other conditions and panel thicknesses space nails maximum 12 inches on center on intermediate supports.

Space fasteners maximum 6 inches on center along intermediate framing members for 3 8 inch and 7 16 inch panels installed on studs spaced 24 inches on center. Max 80 l 40 rake overhangs using lookout blocks shall not exceed 9. Of the roof diaphragm therefore is ww wl x l 2.