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001090
2015-08-20

Modeling of Cross-Laminated Timber Plate Curved by Screw-Press Bonding 1

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.

The reason for this enormous effort was the option to manufacture the precamber of a glulam beam relatively easily and thus cost efficiently. Generally, a precambered cross‑laminated timber plate means higher expenses.

The figure shows a precambered structure of a glulam beam and a cross-laminated timber plate. The glulam beam has the function of a binding girder connected rigidly to the plate.

The second part of my post deals with restoring the forces resulting from the plate curvature that are calculated using the line-imposed deformation, and the third part presents the ultimate calculation of fully loaded "floor beams" in RFEM.


Author

Mr. Kuhn is responsible for developing products for timber structures, and provides technical support for our customers.

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