| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. BAR BENDING SCHEDULE (BBS) VERIFICATION | |||
| A1 | Approved Bar Bending Schedule (BBS) available at fabrication site Acceptance: Signed/stamped structural BBS available; copy provided to fabricator; no fabrication without approved BBS | IS 456:2000 Cl. 12 — Reinforcement detailing | OK NC NA HOLD |
| A2 | BBS matches latest structural drawing revision Acceptance: BBS revision matches drawing revision; no amendments without design approval; mark drawing revision on BBS cover | IS 456:2000 Cl. 12 | OK NC NA HOLD |
| A3 | All bar marks identified per BBS Acceptance: Each bar type (e.g., B1, B2, C1) clearly identified in BBS; fabricator uses same marks on bent bars | IS 456:2000 Cl. 12 — Bar identification | OK NC NA HOLD |
| A4 | Cutting lengths verified including hook and bend allowances Acceptance: Verify 5 bars per mark type: measure actual cutting length; compare to calculated length from BBS; tolerance ±25mm per IS 2502 | IS 2502:1963 Cl. 4 — Bending and cutting practice | OK NC NA HOLD |
| B. CUTTING | |||
| B1 | Correct bar diameter selected per BBS Acceptance: Verify bar diameter with vernier calipers; match to BBS specification for each mark; tolerance per IS 1786 Table 3 | IS 2502:1963 Cl. 4 | OK NC NA HOLD |
| B2 | Cutting length matches BBS — tolerance ±25mm Acceptance: Measure 5 cut bars per mark: length = design length ±25mm; document min/max/mean lengths | IS 2502:1963 Cl. 4 | OK NC NA HOLD |
| B3 | Mechanical cutting only — no flame/torch cutting Acceptance: Verify cutting method: hydraulic shear/guillotine acceptable; flame cutting or burning not acceptable; visually inspect cut end | IS 456:2000 Cl. 12.1 — Cutting methods | OK NC NA HOLD |
| B4 | Cut ends square and free from burrs Acceptance: Cut end perpendicular to bar axis; no burrs or ragged edges; deburr if necessary; ends square within 2mm per bar length | IS 2502:1963 Cl. 4 | OK NC NA HOLD |
| C. BENDING | |||
| C1 | Minimum bending radius per IS 2502 — ≤20mm bars: 4d Acceptance: Measure bend radius on 5 sample bars ≤20mm: radius ≥4d; use radius gauge or template; document actual radii | IS 2502:1963 Cl. 5.1; IS 456:2000 Cl. 12.2 — Bend radii | OK NC NA HOLD |
| C2 | Minimum bending radius per IS 2502 — >20mm bars: 5d Acceptance: Measure bend radius on 5 sample bars >20mm: radius ≥5d; use radius gauge or template; document actual radii | IS 2502:1963 Cl. 5.1 | OK NC NA HOLD |
| C3 | Bending at ambient temperature — no heating permitted Acceptance: Visually confirm bar not heated before bending; no burn marks or discoloration on bar surface; verify with site personnel | IS 456:2000 Cl. 12.2; IS 2502:1963 Cl. 5 | OK NC NA HOLD |
| C4 | Standard 90° hook dimensions — internal radius 4d + extension 12d Acceptance: Measure 5 hooks: internal radius ≥4d; straight extension ≥12d from tangent point; tolerance ±5mm; document measurements | IS 2502:1963 Table 1; IS 456:2000 Cl. 12.2.4.1 | OK NC NA HOLD |
| C5 | 135° hook dimensions — internal radius 2d + extension 10d Acceptance: Measure 5 hooks: internal radius ≥2d; straight extension ≥10d; bend angle ~135° (±10°); tolerance ±5mm in extension | IS 2502:1963 Table 1; IS 456:2000 Cl. 12.2.4.2 | OK NC NA HOLD |
| C6 | Cranking angles and offsets per structural drawing Acceptance: Verify 5 cranked bars: angle to nearest 5°; offset dimension ±10mm; height of crank ±5mm from drawing; use template if provided | IS 456:2000 Cl. 12.2; structural design detailing | OK NC NA HOLD |