Roof Struts And Ties

All structures have forces acting on them.

Roof struts and ties.

Struts should be adequately supported over studs in timber walls. Rafters have a tendency to flatten under gravity thrusting outwards on the walls. The part of the structure that has a tensile force acting on it is called a tie and the part that has a compressive force acting on it is called a strut. Feb 18 2015 explore amber skye padilla s board struts and ties followed by 398 people on pinterest.

The weight of the beam is stretching the rod tensile force. The part of the structure that has a tensile force acting on it is called a tie and the part that has a compressive force acting on it is called a strut. The beam is held in position by a steel rod. The beam is held in position by a steel rod.

Tension members in trusses are called ties and these are members which are being stretched. The struts are needed in the roof frame to transfer the loads from underpurlins and other beams to the load bearing walls. They should have anti slip blocks where necessary to prevent them sliding horizontally. This is in contrast to the tension in a beam in which the tension forces pull outwards from the beam as shown in the bottom diagram.

It is an industry convention that the arrows are shown pulling in on themselves.