Roof Deck Poisson Ratio

As shown in figure 3 the metal roof can be simplified as a thin plate with two opposite simply supported edges two free edges and subjected to a uniformly distributed load.

Roof deck poisson ratio.

Poisson s ratio is the negative of the ratio of lateral strain transverse to the linear strain axial. μ ε t ε l 1 where. A full line of deck accessories such as end closure and pour stop is also available from vulcraft. During this stretching in the vast majority of cases the cross section of the material decreases poisson s ratio shows how the cross section of a deformable body changes under lengthwise stretching or compression.

The poisson s ratio express the relative contraction strain or transverse strain normal to the applied load to the relative extension strain or axial strain in the direction of the applied load. When a stretching force is applied lengthwise to a solid the solid starts to stretch. As with the example of a rubber band when we stretch the length axial the cross sectional width gets reduced transverse and vice versa. Poisson s ratio is a measure of the poisson effect that describes the expansion or contraction of a material in directions perpendicular to the direction of loading the value of poisson s ratio is the negative of the ratio of transverse strain to axial strain for small values of these changes is the amount of transversal expansion divided by the amount of axial compression.

I use ram structural system s frame module for my lateral analysis of steel framed buildings with the following parameters for this type of roof deck. Vulcraft manufactures many different types of deck including roof deck floor deck composite floor deck and cellular deck. Consider 1 1 2 vulcraft type b 20 ga design thickness 0 0358in. Poisson s ratio can be expressed as.

0 30 same as steel elastic modulus. The ratio of this change is called poisson s ratio. μ poisson s ratio. For full details about these or any of our products contact your local vulcraft office.

For a composite deck the factor should be incorporated into the effective thickness that is defined with the deck properties. Red status lights for lateral load cases in ram frame. Ram structural system ram modeler ram structural system ram steel ram structural system ram steel ram structural system tutorial. The ratio of the relative contraction strain transverse lateral or radial strain normal to the applied load to the relative extension strain or axial strain in the direction of the applied load.