Safety code for the erection of concrete framed structures
1978 Edition

IS 8989 mandates that crane rails be installed on stable, firm foundations and securely fixed to prevent displacement during use. For tower cranes, maintaining rail levelness within manufacturer-specified tolerances is crucial to avoid overturning. Only certified operators should operate cranes, with regular maintenance and inspections required. Load limits must be strictly observed, with proper signaling and communication during lifts. The work zone should be secured to keep unauthorized personnel clear, and use of tag lines is advised to control loads. Proper anchorage and stability of crane foundations must be ensured, following all relevant manufacturer instructions and IS standards to mitigate hazards.

Formwork and centering must be designed considering span length, concrete curing temperature, dead and live loads, and safety factors for materials. A qualified engineer must prepare the centering layout, verifying soil bearing capacity and accounting for environmental conditions like wet soil. Prior to pouring concrete, footings should be inspected for soundness, adjustment screws tightened, form panels checked for plumb alignment, and bracing secured. Continuous monitoring during concreting is essential to tighten supports and protect centering from impacts caused by vehicles or swinging loads, thereby ensuring structural stability and preventing formwork failure.

Workers handling cement should wear protective goggles and durable, close-fitting clothing to avoid skin contact and eye irritation. For prolonged exposure, use of gloves and dust masks is necessary. When working above two meters, safety belts or equivalent fall arrest systems are required along with helmets, gloves, and heavy-soled footwear, especially during formwork removal. Scaffolding must comply with relevant IS standards to provide safe access and working platforms. This ensemble of protective gear minimizes risks from chemical exposure, dust inhalation, and falls.

Handling prestressed concrete components requires using designated picking points and lifting devices as specified by the designer. Girders and beams must remain upright and adequately braced during transport to avoid damage. Installation must adhere strictly to the designer's prescribed assembly methods, with temporary supports or connections installed immediately after placement before releasing lifting equipment. Permanent structural connections should be established promptly. During prestressing operations, equipment supplier instructions must be followed closely. Personnel should avoid standing in line with tensioning elements or over jacks, and access behind jacks during stressing should be restricted using signs and barriers to ensure safety.

Ramps and gangways must be constructed with sufficient strength and uniformly supported to safely bear loads. Railings of adequate height should be installed on all open sides to prevent falls. Surfaces must be flat or equipped with cleats to prevent slipping and kept free from grease, mud, snow, or any obstructions. The width should comfortably accommodate material transport, with skirt boards on open edges to avoid spillage. Regular maintenance is essential to keep these pathways clean and hazard-free, complying with IS 8989 recommendations for worker safety during material movement.