compute_cantilever_wall

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Free tier. Renders the MMHW standard only — CESMM4, NRM2 and SMM7 require a paid tier. Anonymous callers welcome. In-situ reinforced concrete cantilever retaining wall with toe, heel, and stem. Includes excavation, blinding, drainage, and backfill quantities. Example params: stem_height=4 m (2–8), stem_thickness_top=0.3 m (0.2–0.6), stem_thickness_bottom=0.45 m (0.25–0.9). Example call: {"params": {"stem_height": 4, "stem_thickness_top": 0.3, "stem_thickness_bottom": 0.45}, "standard": "MMHW"}. Omitted parameters use sensible engineering defaults. Pass deliverables=["xlsx","dxf","pdf"] (any subset) to also receive one-shot download URLs in the same call: Excel BoQ (both tiers, watermarked free) plus the dimensioned DXF (CAD) and PDF drawing sheets (paid tier). Pass `freeboard` (clearance below the wall top, m) instead of the retained-height field to set the retained fill by clearance — the engine back-calculates it as stem − freeboard. Supplying both is rejected.