In this article, a lap joint of a ZL purlin on a monopitch roof is modeled and designed using the Steel Joints add-on, and compared with the load-bearing capacity table of the manufacturer.
The same structures are often needed in several projects, such as the purlin with columns and braces in this example. The dimensions can be changed directly in RFEM or RSTAB by shifting the nodes.
This technical article deals with the stability analysis of a roof purlin, which is connected without stiffeners by means of a bolt connection on the lower flange to have a minimum manufacturing effort.
To stabilize the components bearing stability risks, a shear panel and/or a rotational restraint can be defined in RF‑/STEEL EC3. Optionally, trapezoidal sheets, bracings, or individual purlins can be taken into account.