| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. DEAD LOAD CALCULATION | |||
| A1 | Unit weights assigned per Table 1, IS 875-1 for materials: RCC 25 kN/m³, Steel 78.5 kN/m³, Brick 18-19 kN/m³, etc. Acceptance: Unit weight from IS code Table 1; Value appropriate for material type; Consistent application | Cl. 3.1 — Material density | OK NC NA HOLD |
| A2 | Floor finish dead load: Flooring, screeding, waterproofing loads estimated; typically 0.5-1.5 kN/m² per construction type Acceptance: Load identified per building type; 0.5-1.5 kN/m² range or higher if special finishes; Justified | Cl. 3.2 — Floor finish load | OK NC NA HOLD |
| A3 | Partition load included: Internal walls, office partitions 1-2 kN/m² estimated or calculated per wall layout Acceptance: Partition layout considered; Load = (unit wt × height) / floor span for brick; Or lump sum 1-2 kN/m² | Cl. 3.3 — Partition load | OK NC NA HOLD |
| A4 | Self-weight of beams, columns, walls calculated using member dimensions from drawings; cross-checked with design calculations Acceptance: Dimensions from drawings used; Unit weights per code; Calculated dead load matches design input | Cl. 3.4 — Structural member weights | OK NC NA HOLD |
| A5 | Mechanical/Electrical loads included: HVAC units, pipes, ducts, conduits estimated; typically 0.5-1.0 kN/m² for commercial Acceptance: MEP load estimated based on building type; Justified; 0.5-1.0 kN/m² typical; Documented | Cl. 3.5 — Service loads | OK NC NA HOLD |
| A6 | Total dead load (DL) calculated per floor; distribution to structural members verified; column/beam loads consistent Acceptance: DL tabulated per floor; kN/m² and total kN shown; Tributary areas identified; Loads add up correctly | Cl. 3.6 — Total DL summary | OK NC NA HOLD |
| B. IMPOSED LOAD (LIVE LOAD) ASSIGNMENT | |||
| B1 | Building use identified per IS 875-2 Table 1: Residential 1.5-2.0 kN/m², Office 2.5 kN/m², Retail 4.0 kN/m², Factory 5-7.5 kN/m², etc. Acceptance: Use category per Table 1, IS 875-2; Correct value applied; Building type justified | Cl. 4.1 — Live load category | OK NC NA HOLD |
| B2 | Live load reduction applied where permitted: Cl. 4.2 — Reduction for tributary area ≥15 m² per Annex A of IS 875-2 Acceptance: Reduction formula applied if tributary area >15 m²; Not reduced if <15 m² (worst case); Documented | Cl. 4.2 — Live load reduction | OK NC NA HOLD |
| B3 | Concentrated load consideration: Elevator loads, machinery concentrations, floor loading assumed per code; worst case load placement Acceptance: Concentrated loads identified (elevators, mechanical); Magnitude and location specified; Worst-case placement considered | Cl. 4.3 — Concentrated loads | OK NC NA HOLD |
| B4 | Balcony/terrace loads: If present, typically 3.0-5.0 kN/m² per Table 1, IS 875-2; applied to applicable zones only Acceptance: Balcony load 3.0-5.0 kN/m²; Applied to perimeter only; Not combined with office load elsewhere | Cl. 4.4 — Special area loads | OK NC NA HOLD |
| C. WIND LOAD CALCULATION | |||
| C1 | Design wind speed determined per IS 875-3 Annex B: Zone identified (24-55 m/s typical); return period 50 years assumed Acceptance: Wind speed zone from Annex B map; Value for location confirmed; 50-year return used | Cl. 5.1 — Design wind speed | OK NC NA HOLD |
| C2 | Risk factor (k1) applied per Annex C, IS 875-3: Values 0.97-1.08 based on return period (risk category) Acceptance: k1 from Annex C appropriate to building category; Value between 0.97-1.08; Applied to design wind speed | Cl. 5.2 — Risk factor | OK NC NA HOLD |
| C3 | Terrain factor (k2) assigned per Annex D, IS 875-3: Category I (flat 0.73), II (urban 0.85), III (industrial 1.0); height factor considered Acceptance: Terrain category per location (rural/urban/industrial); Height factor for building elevation; k2 value from curve | Cl. 5.3 — Terrain & height factor | OK NC NA HOLD |
| C4 | Topography factor (k3) considered: Usually 1.0 for flat sites; <1.0 if in wind shadow of higher terrain per Annex E Acceptance: k3=1.0 normal; <1.0 only if justified by terrain; Value documented | Cl. 5.4 — Topography factor | OK NC NA HOLD |
| C5 | Design wind speed calculated: Vz = k1 × k2 × k3 × Vb (basic wind speed); Vz used for pressure calculation Acceptance: Formula correctly applied; k1, k2, k3 multiplied with Vb; Vz documented for each height zone | Cl. 5.5 — Design wind speed | OK NC NA HOLD |
| C6 | Wind pressure calculated: Pd = 0.6 × Vz²; direction factors & shape coefficients applied per Table 2, IS 875-3 Acceptance: Pd = 0.6×Vz² formula; kd (direction) & ka (shape) applied; Net pressure on building surfaces calculated | Cl. 5.6 — Wind pressure | OK NC NA HOLD |
| C7 | Wind load distribution verified: Positive (windward), negative (suction leeward), internal pressure factors considered; lateral load envelope generated Acceptance: Windward pressure positive; Leeward suction negative; Internal pressure if openings present; Envelope shows max/min | Cl. 5.7 — Load distribution | OK NC NA HOLD |