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FIVE STAR SAFETY & HEALTH CONSULTANCY. DOLE ACCREDITATION # 1030-082301-0052. WELCOMES YOU TO Construction Safety for Site Safety Officers Training. DOLE ACCREDITATION # 1030-082301-0052. FIVE STAR SAFETY & HEALTH CONSULTANCY. TEMPORARY STRUCTURES. FORMWORK.
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FIVE STAR SAFETY & HEALTH CONSULTANCY DOLE ACCREDITATION # 1030-082301-0052 WELCOMES YOU TOConstruction Safety for Site Safety Officers Training
DOLE ACCREDITATION # 1030-082301-0052 FIVE STAR SAFETY & HEALTH CONSULTANCY TEMPORARY STRUCTURES
FORMWORK • Required for almost all concrete construction • Shoring & bracing support the forms • Support the temporary weight of materials; reinforcing steel, live loads of workers & equipment
STAGES IN FORMWORK OPERATIONS • Assembly & erection • Concrete placement • Stripping & dismantling
HAZARDS IN FORMWORKS • Falls • Materials handling • Struck against • Struck by • Electrical contact • Movement
HAZARDS IN FORMWORKS • Collapses • Ladders • Health hazards • Dust & concrete • Access equipment • Lighting
INJURIES FROM FORMWORK • Eye injuries • Cuts, scrapes, punctures • Back injuries • Ankle sprains & fractures • Bruises & contusions • Fall injuries
CONTROL OF FORMWORK HAZARDS • Planning • Assembly • Stripping
PLANNING • Fall protection • Work platforms • Material staging areas • Housekeeping • Material handling • Management components • Ease in pounding, stripping & removing • Strong enough to stand lifting
ASSEMBLY • Adequate braces & support • Reliable bearing surfaces • Adequate ties, bolts, bracings
STRIPPING Most hazardous operation in concrete construction. Hazards can be reduced by • Built-in safe stripping in design • Supply of logistics for removing materials as they are stripped • Providing proper tools & adequate access • Training personnel • Proper work sequence
On 5 February 2013 five construction workers were killed and 12 others were hurt when a 70-foot-high scaffolding they were standing on collapsed in Pililia, Rizal Sunday. The workers were fixing the smokestack of SPC Malaya Power Corp.’s power plant in Barangay Malaya when the scaffolding caved in. They were employed by East-West Works Industrial Services Inc. Based on the latest PCAB List of Licensed Contractors, East-West Works Industrial Services Inc. is unlicensed. • Republic Act 4566 (the Contractor’s License Law) as amended by PD 1746 mandates that all contractors in the country first secure a license from PCAB before engaging in construction activities in the country. Failure to comply is an offence under the law.
SCAFFOLDING An ACCESS SCAFFOLD is a temporary structure usually made of metal frames and tubing, which provides temporary support and access for workers and materials used in construction, demolition, repair and maintenance work. Standard Tubular Frame Scaffold most frequently used scaffolding system in construction. It is made of steel tubing or aluminum and is manufactured in various configurations and spans.
SCAFFOLDING The spans in frame scaffolds normally range from 1.5 meters (5 ft) to 3 meters (10 ft) These span lengths are varied using different lengths of bracing. Most manufacturers have braces which will provide spans between 1.5 meters (5 ft) and 3 meters (10 ft) in length.
The most important consideration with these scaffolds is that both horizontal and vertical bracing must be used with the standard tubular frame systems. Also, outrigger supports may have to be provided to ensure the stability of the scaffold. Rolling scaffolds must be erected so that the height-to-base width ratio is no greater than 3 to 1. This limits platform height with standard outrigger stabilizers and single span towers to approximately 9.5 meters (30 ft), [this assumes outrigger stabilizers are 3 meters (10 ft across)]. Rolling Scaffolds NOTE: No worker may "ride" the scaffold when it is being moved from one location to the other, unless the worker is secured to the building in a manner to prevent the worker from falling, if the scaffold overturned or became unstable.
Fold-Up Scaffold Frames Fold-up scaffold frames are frequently used by trades such as electricians, painters and suspended ceiling workers. Widths range from 330 mm (13 ") to the standard width of about 1.5 meters (5 ft). Tube-and-Clamp Scaffolds Tube-and-Clamp scaffolds are frequently used where obstructions or non-rectangular structures are encountered. The scaffolds are infinitely adjustable in height and width. They can also be used for irregular and circular vertical configurations.
Dismantling Scaffolds The dismantling of a scaffold proceeds in reverse order to its erection. In addition to this, workers should be equipped with a safety harness and lifeline for securement to a suitable anchoring system, since guardrails will not always be in place as dismantling proceeds.
Scaffold Stability • Three-to-One Rule • The ratio of unsupported height to least lateral dimension on a scaffold should not exceed 3 to 1, unless the scaffold is: • 1. tied-back to the structure at proper horizontal and vertical intervals • 2. equipped with outrigger stabilizers to maintain the ratio of 3 to 1 • 3. equipped with a properly designed anchored guy wire system. • Outrigger Stabilizers • To maintain the 3 to 1 ratio, some scaffolds have outrigger stabilizers which may be attached to the scaffold base. • Tie-Back Requirements • Scaffolds which exceed the 3-to-1 rule must be tied in to a building or structure at intervals not exceeding 3 times the least lateral dimension of the scaffold. This usually means tie-ins are applied at every third frame vertically and every second frame horizontally for tubular frame scaffolds.
