All four sides should have diagonal bracing attached. The maximum intended load of a 10-inch wide, two-inch nominal thickness wood scaffold plank platform with the scaffold frames seven feet apart horizontally is approximately 175 pounds. Collapse is another major concern. K. Doyle Taylor • Planks must overhang their support by at least 150mm but no more than 250mm otherwise uplift might occur. This means that the plank must be able to support four times what you are placing on it. all scaffold pins must be in place prior to using a scaffold. Spur scaffold . Place and secure the horizontal runners and bearers by driving the wedge as previously described. 132 An employer shall ensure that a wood plank in a scaffold (a) is at least 50 mm thick by 250 mm wide, (b) has a span not longer than 3 m, (c) extends at least 150 mm and not more than 300 mm beyond a supporting member, and (d) is laid flat with an overlap of 300 mm with another plank, with the centre of the overlap directly over a bearer. Do not exceed more than four rosettes (6' 6") before you place this second wrap. Cross bracing is acceptable in place of top rail when the ‘x’ is between 30 and 48 inches above the work surface. Image Source: blackcatjsc.com.vn, chemey.com, larrysrentall.com, safesmartaccess.com.au, scaffold-equipment.com, General Guidelines for Scaffolding Safety in Construction. Loads on planks must be evenly distributed and not exceed the allowable loads for type of plank being used. 12.Work platforms must be fully planked either with lumber that has been properly inspected and graded as scaffold plank or with fabricated platforms or planks in good condition. Planks may overlap planks on straight runs on hanging bracket scaffolds—where butting of planks at a pair of brackets cannot be achieved—provided the overlap is at least 300 mm. Directorate of Construction, Occupational Safety & Health Administration, Occupational Safety and Health Administration, Severe Storm and Flood Recovery Assistance. Not more than 1-inch gaps. Plank has a long split and unable to bear load. Wooden Platforms (i.e. It is important to know how to identify defects in planks. b. Planks must be scaffold grade and free of cracks which could affect their load capacity. Beyond having a qualified person overseeing the design, it’s important to closely exam the worksite to ensure that workers will be able to do their jobs safely during all phases of scaffolding assembly, use and disassembly. wide. Planks used for each platform must adhere to the same weight capacity as the scaffolding itself. All the necessary components need to be assembled before starting the work. Platform without railings is a grave concern in the construction industry. In both methods the ends of each scaffolding plank are overlapped with the ends of the adjacent planks. Where planks overlap, rest the cleated end on the support. To be used for scaffold plank, solid-sawn lumber must be scaf-fold grade, nominal 2x10 inches ( 1 1⁄ 2 x 9 1⁄4 or 11⁄2 x 9 1⁄ 2 inches) or larg e r. Among the wood species used for solid-sawn scaffold plank, South-e r n yellow pine and Douglas fir are a p p r oved for the longest spans and heaviest loads. Next, attach the diagonals. St. Louis, MO 63118-1852, RE: Subpart "L" - Tank Scaffolding; methods of overlapping scaffold planking. Section 1926.451(b)(7) states, "on scaffolds where platforms are overlapped to create a long platform, the overlap shall occur only over supports, and shall not be less than 12 inches (30 cm) unless the platforms are nailed together or otherwise restrained to prevent movement." * The frame scaffold must be capable of supporting four times the maximum intended load. "2"" min - 36"" max" B. On a 10-section wide frame scaffold, the overlap for each plank on top of each other must be 12 inches. requirements for the performance of scaffold planking. Unsupported ends of scaffold planks must not project more than 12 inches past their support ledger. Another common problem is insufficient or excessive overhang of planks at their support. Note: This does not refer to overlap of planks on putlogs. Fabricated scaffold planks and platforms unless cleated or restrained by hooks shall extend over their end supports not less then 6" nor more than 12". Access in the form of a secured ladder, stair tower, ramp, etc. The standard does not specify whether both ends of each plank must overlap the same way. The first is to install toe boards or netting on work platforms to prevent these items from falling to the ground or lower-level work areas. Platforms should reach as close to the uprights as possible, no more than one inch of space without barriers. After reviewing the variance and the scaffolding standard that was in effect in 1975, we have determined that the variance did not address this issue. two (2) planks laid side by side, and must overlap their support ledger by not less than 6 inches. Required whenever there is 24 ” vertical change to an upper or lower level should... Free of cracks which could affect their load capacity plank must overlap the next by. 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