Boards, scaffolding

Suitable means of access, such as roof ladders, crawling boards, scaffolding and staging must be provided. 

Scaffold risers to be made of 1- by S-in. boards, crosspieces of 2 by 4 in. supports to be properly cross-braced... 

The effect of direct radiation windows on overall thermal performance is great. This effect was minimized by quilting the adjacent blankets to close the glass gaps. To further secure the blankets together, glass-cloth tapes were tied circumferentially and longitudinally around the entire inner vessel. The scaffold boards were then removed from the annular space and the dollar plate welded back in place after installation of the blankets was completed. 

Slipped on scaffold board which was bridging a pool of muddy water Tripped on tying wire Fell approx. 2.5 m from untied ladder Stumbled while walking along a trench invert Slipped on walkway and struck hand against handrail Trapped between projecting H-pile and slewing crane. 

All kinds of materials—from nuts, bolts and hand tools to bricks, boards and girders—can fall on to others from heights such as scaffolds, platforms, roofs and plant. 

Prevent the release of the energy. Example Attach toe boards on scaffolds to prevent tools from striking people or objects below... 

BS 2482 1981 Specification for timber scaffold boards, British Standards Institution,... 

Crawling board (chicken ladder) means a supported scaffold consisting of a plank with cleats spaced and secured to provide footing, for use on sloped surfaces such as roofs. 

The current high cost of carbon fibres somewhat limits their application. Nevertheless, carbon fibre-reinforced concrete has been used in cormgated units for floor constmction, single and double curvature membrane structures, boat hulls, and scaffold boards. The overall cost may be reduced if other fibres are used in combination with carbon fibre. 

Work at height accounts for about 50-60 deaths - more than any other workplace activity - and 4000 injuries each year. During the first two weeks of June 2003, inspectors from the Health and Safety Executive visited 1446 construction sites and stopped all work at one quarter of them due to concerns about the level of risks of falls from height. Another 5% of sites visited were issued with improvement notices. Other problems included a lack of or inadequate toe boards and intermediate guard rails on scaffolding and working platforms. 

Platforms based on trestles should be fully boarded, adequately supported (at least one support for each 1.5 m of board for standard scaffold boards) and provided with edge protection when the platform is 2 m or higher. 

Toe boards these are fitted at the base of working platforms to prevent persons, materials or tools falling from the scaffold. 

All stacking of materials and equipment, such as bricks, must be as close to standards as possible to enable the added weight to be more evenly distributed throughout the scaffold. The boards will need some additional fixing to the structure so that they are protected from lifting during high winds. 

Are standards (uprights) resting on suitable base plates and (where the scaffolding is not on hard standing) timber sole boards Bricks, blocks and other building materials should not be used as packing. 

Are there effective barriers or warning notices in place to stop people using an incomplete scaffold, e.g. where working platforms are not fully boarded ... 

Board of Certified Safety Professionals 92 15 Honeywell Safety Products, Sperian and North 49 285 Scaffold Training Inst. 110... 

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