Parametric input allows you to enter the model data and load data in a specific way so they are dependent on certain variables (parameters). You can enter the parameters directly or calculate them from other parameters and constants, and furthermore, it is possible to access the cross-section values. This can be useful, for example, when calculating precambers, depending on the standard.
This part explains the determination of forces arising when screwing a straight cross-laminated timber plate to a curved glulam beam. For this, a glulam beam with a curved member was modeled in RFEM. The member has a precamber of 12 cm, since the preliminary design showed that the applied precamber of 6 cm will never be sufficient to maintain l/300. The dimensions of the bottom chord are 12 cm wide by 32 cm high. The plate was selected in RF‑LAMINATE as a three‑layer plate with a thickness of 8 cm.
Our client had the exciting task of modeling a cross‑laminated timber plate with a precamber such that, in the case of a span of more than ten meters, the deformation was below the limit value of l/300 = 3.3 cm. The idea was to screw the plate on a glulam beam and then put it together with a glue approved by the building authorities in order to create a rigid bond between the plate and the member.