RCC Column/Wall Quality Check Procedure
Comprehensive quality control procedure for RCC column and wall construction ensuring structural integrity, quality, and durability through systematic inspection and testing methods in accordance with Indian Standard codes.
Duration: 14-28 days
Team: 5-8 workers
Risk Level: Medium
Quality Priority: High
To establish a comprehensive quality control procedure for RCC Column/Wall Construction, ensuring structural integrity, load-bearing capacity, and seismic resistance through proper inspection and testing methods in accordance with Indian Standards (IS Codes) including material handling, execution, and documentation.
- Verify structural drawings are approved by competent authority
- Check column/wall dimensions, reinforcement details as per drawings
- Ensure design meets seismic requirements as per IS 13920:2016
- Verify concrete grade specification (M20/M25/M30)
- Check foundation adequacy for proposed column loads
IS 456:2000
IS 13920:2016
- Cement: Verify test certificates, check manufacturing date (not older than 3 months)
- Steel bars: Check TMT certification, tensile test reports, size tolerance
- Aggregates: Verify gradation, specific gravity, water absorption tests
- Water: Ensure potable water or test for pH, chlorides, sulphates
- Admixtures: Check manufacturer certification and compatibility
- Shuttering material: Verify plywood grade, thickness, surface finish
IS 1786:2008
IS 383:2016
IS 4990:2011
- Verify center lines and grid lines from foundation
- Check column positions with reference to approved drawings
- Ensure proper benchmarks and reference points are established
- Verify verticality of column dowel bars from foundation
- Check adequacy of working space around column areas
IS 962:1989
- Verify cutting list and bar bending schedule (BBS) accuracy
- Check bar lengths with tolerance ±25mm
- Ensure proper bending radius (min 2.5 times bar diameter)
- Verify hooks and bends as per IS 456:2000 requirements
- Check bar marking and identification system
- Ensure bars are free from mud, oil, paint, loose rust
IS 456:2000
IS 2502:1963
- Verify main reinforcement placement as per drawings
- Check spacing of longitudinal bars (tolerance ±10mm)
- Ensure minimum reinforcement percentage (0.8% for columns, 0.4% for walls)
- Verify development length of dowel bars (45 times bar diameter)
- Check proper lapping arrangements:
- 40 × dia (in tension zone) – IS 456:2000
- Lapping in central 1/3rd of column height only – IS 13920
- No laps in joint or 2d from face of joint
- Maximum 50% of bars lapped at one section
IS 456:2000
IS 13920:2016
- Verify stirrup diameter (minimum 8mm for seismic zones)
- Check spacing requirements:
- Within beam-column joint: ≤ 100mm
- Column ends (2 times depth): ≤ 100mm
- Middle zone: ≤ 300mm or least dimension/4
- For walls: ≤ 300mm both directions
- Ensure proper 135° hooks at both ends
- Check lateral tie extension into core (6 times tie diameter)
- Verify cross ties for columns with more than 4 main bars
IS 13920:2016
IS 456:2000
- Verify concrete cover as per exposure conditions:
- Mild exposure: 20mm (walls), 25mm (columns)
- Moderate exposure: 30mm
- Severe exposure: 45mm
- Very severe/Extreme: 50mm
- Check cover block quality (same grade as main concrete)
- Ensure adequate spacers at 1m intervals
- Verify cover tolerance (±5mm)
IS 456:2000
- Verify formwork dimensions match structural drawings
- Check tolerances: ±6mm for cross-section, ±12mm for length
- Ensure proper verticality using plumb bob (tolerance 1:300)
- Check alignment with adjacent structural elements
- Verify opening dimensions for doors, windows, services
IS 456:2000
IS 14687:1999
- Verify plywood grade (BWP/BWR) and thickness (min 12mm)
- Check formwork joints are tight and leak-proof
- Ensure adequate props and bracing against lateral loads
- Verify tie rod spacing and capacity
- Check release agent application (not oil-based)
- Ensure formwork is clean and free from debris
IS 4990:2011
IS 14687:1999
- Verify concrete mix design approval and implementation
- Check slump test results (75-150mm for pumped concrete)
- Ensure concrete temperature (not exceeding 32°C)
- Verify admixture dosage and mixing time
- Check workability and cohesiveness
- Ensure no bleeding or segregation
IS 1199:1959
IS 10262:2019
- Pour concrete in layers not exceeding 1.5m height
- Use needle vibrator (25-40mm diameter)
- Ensure proper vibration without over-vibration
- Avoid honeycombing and voids
- Check for complete filling around reinforcement
- Verify no displacement of reinforcement during pouring
IS 456:2000
- Prepare cube samples (minimum 6 cubes per 50m³ or fraction)
- Ensure proper cube preparation and curing
- Test cubes at 7 and 28 days
- Verify strength compliance (minimum 85% of characteristic strength)
- Conduct non-destructive tests if required:
- Rebound hammer test
- Ultrasonic pulse velocity test
- Core cutting test (if strength deficiency)
IS 516:1959
IS 13311:1992