Roof Grillage R1.

Research record

The detail behind
the study.

Source-linked work for this revision. Reported checks describe the stated model or test; physical qualification and applicability to the current retrofit remain separate.

Preliminary roof load-path calculation

The model applies 101.44 kPa to the complete 3.102 by 2.101 m projected roof, including the access closure. Applied load is 661.115 kN from those rounded dimensions. All vertical reactions balance this load.

This is a linear beam grillage with idealized rigid joints and equivalent assumed E/G. The source records strip loading, header redistribution, supports and exclusions. Three meshes produce a maximum sampled downward displacement of approximately 0.692 mm. This is bending/torsion response only, not complete roof movement: shear, joint/support compliance, laminate behavior, wall thrust, stability, panels and closure are excluded. No allowable or safety factor is established.

The solver was checked independently against a simply supported uniformly loaded beam. Use the support reactions and element end forces in linear-grillage.json for further joint and support development, not as a fabrication release. Method reference: https://teachbooks.tudelft.nl/computational-modelling/structural_linear/euler_bernouilli.html