Base Contact 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.

Mapping the nominal post case directly onto the 18 aligned 120 × 80 mm shoes gives a peak nominal average of 6.24 MPa. The corresponding roof pressure is only 0.10144 MPa. This exposes a strong concentration at the floor interface that the current skin/bedding design has not resolved.

This is a screening assumption, not a solved base reaction or a soil capacity check. Base-member bending can redistribute forces between shoes; curved contact, local compliance and external bedding can change the pressure distribution. The projected blank area is not a verified effective bearing area. The roof-pressure reference is not a geotechnical allowable.

Do not reduce the shoes or claim that nominal contact completes the load path. A distributed base support and its skin/bedding interaction must be designed. The CSV maps all 18 nominal-case reactions to shoe IDs; the JSON also retains rigid and half-stiffness post cases.

All three cases retain the 661.115 kN roof resultant. No floor strength, settlement, punching, buckling or support-loss acceptance is established by this calculation.