Measure shelf depth and centre of gravity. Books at the front edge create more leverage than the same weight near the wall.
Method basis: Rigips/Knauf system guidance and Fischer/Hilti fixing-selection principles. Final parameters always come from the selected product data.
How to plan the installation
Match bracket count to shelf length and stiffness, then match fixings to the actual base. Check screws joining the shelf to its brackets too.
Common mistake
Do not calculate only the empty board or ignore a person leaning on the shelf.
Pre-start check
- Was the structural base identified rather than only the finish?
- Does the weight include contents and projection?
- Were services, edges and minimum spacing checked?
- Does the product data permit the base, direction and environment?