4.Use tow lines to raise or lower tools and equipment. By itself it is not normally a useable foundation material. a.5 feet Be sure scaffolding stays level and plumb as erection progresses. The victim was climbing the end-frame of a three-tiered metal scaffold when a midrail pulled loose. Stairs must be at least 18 inches wide and have a landing platform at least 18 inches long at each level. Counterweights shall be secured by mechanical means to the outrigger beams. Select all that apply and then click DONE. They are frequently used in one or two tiers by residential contractors, painters, etc., but their modular frames can also be stacked several stories high for use on large-scale construction jobs. \end{array} & \begin{array}{l} c.After it has been used Specific requirements for one type each ofsupported scaffold (tubular welded frame) and suspended scaffold (two-point suspension) are included in the sections below. The use of shore scaffolds and lean-to-scaffolds is strictly prohibited. To protect against falling objects, screens must be installed between the toeboard and midrail if anyone is required to pass under the scaffolding. Select the correct answer and then click DONE. All scaffolds and their components must support without failure its own weight and at least four times the maximum intended load applied or transmitted to the scaffold. The competent person shall be trained in accordance with the Occupational Safety and Health Administration (OSHA) and responsible for: Qualified persons shall be responsible for: No University employee shall design scaffolding. What is the most common type of supported scaffold? Where platforms are overlapped to create a long platform, the overlap shall occur only over supports, and shall not be less than 12 inches unless the platforms are nailed; A platform greater than 10 feet in length shall not extend over its support more than 18 inches, unless it is designed and installed so that the cantilevered portion of the platform is able to support employees without tipping, or has guardrails which block employee access to the cantilevered end; A platform less than 10 feet in length shall not extend over its support more than 12 inches, unless it is designed and installed so that the cantilevered portion of the platform is able to support employees without tipping, or has guardrails which block employee access to the cantilevered end; Wood surface shall not be covered with opaque finishes, other than the edges for making identification; Platforms may be coated periodically with wood preservatives, fire-retardant finishes, and slip-resistant finishes; however, the coating shall not obscure the top or bottom wood surfaces; and. Select the correct answer and then click DONE. A ladder or other safe means of access must be provided. 262 Alexander Street Base plates or screw jacks shall be in firm contact with both the sills and the legs of the scaffolding. Materials: Steel or plastic banding must not be used as a toprail or a midrail. b.Dismantle the scaffolding. 6 inches It is impossible for a stable scaffold structure to be built unless _____. d.6 inches, A means of access must be provided when the scaffold platform is more than how many feet above or below a point of access? Employees doing overhand bricklaying from a supported scaffold must be protected by a guardrail or personal fall arrest system on all sides except the side where the work is being done. In such cases, verify that the platforms are as wide as feasible, and fall protection is provided. (b) Googles? Tiebacks must be secured to a structurally sound anchorage on the building or structure. endstream endobj 15 0 obj <> endobj 17 0 obj <> endobj 22 0 obj <>/Font<>/ProcSet[/PDF/Text/ImageB]/XObject<>>>/Rotate 0/Type/Page>> endobj 1 0 obj <>/Font<>/ProcSet[/PDF/Text]/XObject<>>>/Rotate 0/Type/Page>> endobj 5 0 obj <>/Font<>/ProcSet[/PDF/Text]/XObject<>>>/Rotate 0/Type/Page>> endobj 8 0 obj <>/Font<>/ProcSet[/PDF/Text]/XObject<>>>/Rotate 0/Type/Page>> endobj 11 0 obj <>/Font<>/ProcSet[/PDF/Text]/XObject<>>>/Rotate 0/Type/Page>> endobj 54 0 obj <>stream a scaffold must have a safe means of access to the scaffold when access is feasible and does not create a greater hazard. 3.Maintain three points of contact while on a ladder. a 1 b 2 c 3 d 4 \text { Target } \\ 2.Work at a lower level than they usually do. The scaffolding components are clearly from various manufacturers. are specifically designed and constructed for use as ladder rungs, are not used as work platforms when rungs are less than 11 inches in length, unless each affected employee uses appropriate fall protection, have rungs which are uniformly spaced and a length of at least 8 inches, with a maximum space between rungs of 16 inches, have rest platforms provided at a maximum of 35 foot vertical intervals, a stair rail consisting of a toprail and a midrail on each side of the stairway, a toprail of each stair rail system capable of serving as a handrail, unless a separate handrail is provided, sufficient handhold on handrails, and toprails serving as handrails, for employees grasping them to avoid falling, stair rails and handrails surfaced to prevent punctures or lacerations to employees, and to prevent snagging of clothing, stair rails and handrails constructed so that they do not constitute a projection hazard, a space of at least 3 inches between handrails, or stair rails used as handrails, and other objects, a distance of no less than 28 inches and no more than 37 inches from the upper surface of the stair rail to the forward edge of the tread, in line with the face of the riser, a landing platform at least 18 inches wide by 18 inches long at each level, a scaffold stairway width of at least 18 inches between stair rails, slip-resistant surfaces on treads and landings, stairways installed between 40 degrees and 60 degrees from the horizontal, guardrails meeting OSHA requirements on the open sides and ends of each landing, uniform riser height, within -inch, for each flight of stairs, greater variations in riser height are allowed for the top and bottom steps of the entire system (not for each flight of stairs), uniform tread depth, within -inch, for each flight of stairs, Ensure ramps and walkways 6 feet or more above lower levels have guardrails that comply with. Do not use unstable objects such as loose bricks, blocks of wood or concrete to shore up the uneven surface. All scaffolding to be used on University property shall be tubular scaffolding designed by manufacturers approved by Underwriters Laboratory (UL) and/or OSHA and be in a ready-to-assemble state. Make sure employees do not use cross-braces as a means of access. A scaffold is a temporary structure erected to support access or working platforms. The competent person would need to know the individual scaffold base plate loading and if each one is below the maximum allowable deck loading. It is generally applied as a thin coat over a base coat and takes several days to achieve its designed strength. Be sure employees are able to safely access any level of a scaffold that is 2 feet above or below an access point. Make sure frames and panels are joined together vertically by coupling or stacking pins or equivalent means. The end points at each upright shall be no more than 48 inches. Ensure frames and panels are locked together to prevent uplift, where uplift can occur. 1.Wear personal fall arrest systems (PFAS). Access must be provided when the scaffold platforms are more than 2 feet (0.6 m) above or below a point of access. Select all that apply and then click DONE. c.Four times Direct access is acceptable when the scaffold is not more than 14 inches (36 cm) horizontally and not more than 24 inches (61 cm) vertically from the other surfaces. fall protection systems in place, falling object prevention in place, appropriate access / egress to and from the scaffold, appropriate anchorage and stability of the structure, appropriate walking / working surfaces, maintaining appropriate clearances from electrical hazards, etc.). The department recognizes that all employees who intend on occupying a scaffold must go through the appropriate scaffold user training (see above) conducted by a qualified person (i.e. a.15 feet Sand, gravel, masonry units, rolls of roofing felt, and other such materials shall not be used as counterweights. What do you need to do with a ladder that is defective? Poor foundation: Scaffold end frames, which have no base plate, are erected on top of scrap wood and unstable cement blocks. TypeofAdvertisementProductAdvertisedTargetMarketProductInformationFeaturedTelevisionBlackberryStudents-backtoschoolBlackberryPearl;$20discount;pinkorsilver;usetogete-mail,surftheWeb,andgetdirections\begin{array}{llll} Specific requirements for one type each ofsupported scaffold (tubular welded frame) and suspended scaffold (two-point suspension) are included in the sections below. 09/18/2013. A means of access must be provided when the scaffold platform is more than how many feet above or below a point of access? c.40 - 48 inches c.Three feet As they return to the site to continue their work, the first step they should take is to: Hard hats a.Competent person being laid. Designing components in accordance with design specifications. The number one scaffold hazard is worker falls. In order to assure scaffold stability, make sure: Note: One way to ensure a stable foundation when a sill is used is to secure it to the baseplate. d. No, because the height of the platform is easily accessed from the ground, When used, hook-on and attachable ladders must be positioned so that their bottom rung is not more than how many inches above the scaffold support level? a. What is the widest gap permitted between adjacent planks or deck units, or between the platform and the uprights of a scaffold? Damaged or deteriorated equipment shall not be used. 1.Climb the cross braces. The footing of scaffolding must be sound and rigid, capable of supporting the weight. Cross bracing is not acceptable as an entire guardrail system but is acceptable for a toprail when the crossing point of the two braces is between 38 inches (0.9 meters) and 48 inches (1.3 meters) above the work platform and for midrails when between 20 inches (0.5 meters) and 30 inches (0.8 meters) above the work platform. Additionally, there is no material cohesion; during a storm the material can wash away under the scaffold base plates. 1.Slips and falls The team is given a set of scaffolding components to assemble. b.1 inch The following sections can be referenced for specific guidelines when using scaffolds at Princeton. answers again. 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