| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. PRE-ERECTION VERIFICATION | |||
| A1 | Foundation/anchor bolt check — position tolerance ±2mm per IS 800 Cl. 15.4 Acceptance: Measure bolt hole positions relative to grid reference lines: tolerance ±2mm x-direction, ±2mm y-direction; document actual positions; reject if >±2mm deviation | IS 800:2007 Cl. 15.4 — Foundation bolt positions | OK NC NA HOLD |
| A2 | Column base plate level survey — tolerance ±3mm per IS 800 Acceptance: Spirit level or laser level survey: base plate surface variation ≤±3mm end-to-end; if uneven, grout/shim; document survey data with 4-point measurements | IS 800:2007 Cl. 15.4 — Base plate leveling | OK NC NA HOLD |
| A3 | Grout preparation — strength and placement Acceptance: Grout mix minimum M25 (25 MPa); thickness under base plate 40-50mm; ensure full contact between plate and grout (no voids); cure grout per spec (min 7 days before full load) | IS 800:2007 practice; foundation design standard | OK NC NA HOLD |
| A4 | Erection sequence approved by engineer Acceptance: Written erection sequence/plan available; signed by engineer; sequence followed on-site; temporary bracing plan documented | IS 800:2007 Cl. 7 — Stability during erection | OK NC NA HOLD |
| A5 | Crane capacity adequate for heaviest member Acceptance: Crane capacity ≥1.5× heaviest member weight; certification provided; rigger and supervisor qualified; erection insurance in place | IS 800:2007 Cl. 7 — Safe erection practice | OK NC NA HOLD |
| B. MEMBER IDENTIFICATION | |||
| B1 | All members marked per erection drawing Acceptance: Member tag matches erection drawing mark; tag securely attached; legible; member delivered to correct location per drawing sequence | IS 800:2007 practice; traceability | OK NC NA HOLD |
| B2 | Heat number / test certificate traceable Acceptance: MTC available before erection; heat number marked on member; MTC filed for QA records; steel grade per drawing (E250/E350/E410) | IS 2062:2011 — Material traceability | OK NC NA HOLD |
| B3 | No damage during transport/handling Acceptance: Visually inspect member: no dents >3mm, no cracks, no section distortion; lateral bracing intact during transport; if damaged, engineer approval required before use | IS 800:2007 practice; workmanship | OK NC NA HOLD |
| B4 | Protective coating intact — no major flaking or damage Acceptance: Inspect 5 locations on member: coating intact (no flaking >50mm²); minor surface scratches acceptable; deep rust or flaking ≥50mm² must be repaired per spec | IS 800:2007 Cl. 11 — Protection against corrosion | OK NC NA HOLD |
| C. COLUMN ERECTION | |||
| C1 | Plumb check — tolerance 1 in 600 (max ±12mm per 7m height) Acceptance: Measure plumb with plumb bob or laser: column vertical within 1:600 (e.g., 7m height: ±11.7mm tolerance); adjust temporary braces as needed; document measurements | IS 800:2007 Table 26 — Erection tolerances | OK NC NA HOLD |
| C2 | Alignment to grid — horizontal offset ±5mm per IS 800 Table 26 Acceptance: Measure offset from grid reference lines: x-direction ±5mm, y-direction ±5mm; if offset >5mm, adjust with shims or re-set; document offsets | IS 800:2007 Table 26 | OK NC NA HOLD |
| C3 | Base plate bearing — uniform contact across bearing area Acceptance: Check with feeler gauge/straight edge: max gap under base plate ≤1.5mm; if larger gap, add shim/grout; base plate fully seated; anchor bolts snug-tight | IS 800:2007 Cl. 15.4 | OK NC NA HOLD |
| C4 | Temporary bracing secured before releasing crane Acceptance: Temporary bracing installed and secured before crane release; bracing members rated for construction loads; torque checked; bracing remains until permanent connections completed | IS 800:2007 Cl. 7 — Safety during erection | OK NC NA HOLD |