Shape Parameters of a Frame Truss
Architectural, Framer
You can set the frame truss parameters in the dialog box. The parameters at the top of the box are the same as those of a standard truss. The parameters at the bottom affect the shape of the frame truss opening. You need not define values for all parameters, and you should start designing the truss by defining values for the most important parameters only.
- Tolerance
- You can use the Tolerance parameter to set the width of the opening to be divisible by a certain dimension. The width of the opening is determined depending on the other parameters defined to be the largest possible dimension divisible by the tolerance value.
- Max Horizontal Space and Min Horizontal Edges
- The width of the opening in a frame truss can be limited using the Max Horizontal Space parameter, which determines the maximum width of the opening, or the Min Horizontal Edges parameter, which determines the minimum width of the edges on either side of the opening.
- Maximum Height and Minimum Height
- The Maximum Height and Minimum Height parameters can be used to limit the height of the opening. The minimum height value also affects the width of the opening.
- Thickness Of Floor and Thickness Of Roof
- The Thickness Of Floor and Thickness Of Roof parameters can be used to determine divergent structural thicknesses from the other truss sections for the room space limited by the opening for the floor and the roof.
- Corner Slope and Wall Slope
- The Corner Slope parameter can be used to define the gradient of the ceiling limited by the opening to be different from the roof gradient. The Wall Slope parameter can be used to define the gradient of the room walls to differ from vertical. The gradient is typed as a ratio, either as a fractional number or a decimal number, for example 1/2 or 0.5.
- Ridge Hollow Min Height and Ridge Hollow Thickness
- You can define a ridge cavity for the truss by defining values for the Ridge Hollow Min Height and Ridge Hollow Thickness parameters. The Ridge hollow thickness will determine the thickness of the walls of the cavity. In order for a ridge hollow to be created, you need to have a maximum height defined for the opening, and a cavity conforming to the parameters needs to fit in the space above the opening.
