When you wish to create a structure which has a sheared shape, such as a bridge deck, you can use the Shear command to transform and rectangular structure into a sheared shape.

To shear a group of members in a frame

§    Select the members to be sheared

§    Choose Shear… from the Geometry menu

A dialog box will appear with fields for the origin from which the shear angle will be measured, the direction to shear and the angle of the shear.

§    Click OK to shear the members