Pneumatic Tube

Pneumatic tube is the form generated by an axis (line in 3D) and a circular cross-section of constant radius.At the moment, WinTess3 finds form of only closed pneumatic tubes. When we use the menu File | New | Pneumatic tube, the program displays the parameter window of the tube. First of all, we must enter the axis of the…

Air Supported Rectangle

Outside and inside views of a pneumatic cover for a swimming pool. You can see the cylindrical central section and the corners with a symmetrical pattern. Air supported or pneumatic structures have been popular at certain times (especially in the second half of the 20th century) in the design of economic covers: warehouses, sports fields,…

Spherical Dome

The spherical domes have been, and remain, one of the simplest forms of tensile structures. The internal pressure produces uniform stress on spherical surfaces, and this is the main reason why they have been preferred. Other reasons, such as aesthetics, simplicity in manufacturing, etc., have also served to popularize this type of form. When we use…

Pneumatic Cushion

Pneumatic cushions have always existed, but since the appearance of ETFE material (transparent or translucent) have become very popular. It is a space enclosed by two membranes, one upper and one lower. They are kept separated by the internal pressure of the air which is higher than the external pressure. This pressure difference is usually greater than…

Pneumatic Structures and Internal Pressure

One of the forms of pretensioning a membrane is to overpressure of the interior air. When a membrane is subjected to an air pressure has a certain curvature, this pressure causes the membrane a stress that is proportional to the curvature. So, if it’s a membrane of cylindrical shape, with a certain radius of curvature…

Creating a Cushion

With the advent of ETFE in the world of lightweight construction, cushion creation has become a common strategy. A cushion is a set of two membranes: one upper and one lower. Therefore, the best way to approach this creation in WinTess3 is to create the two separate membranes and then put them together. Suppose that…