d.Choose access points. Portable ladders tied off to the structure; Less than 300 volts; 3 feet; Two times the length of the line insulator, but never less than 10 feet, 300 to 50 kv; 10 feet; Two times the length of the line insulator, but never less than 10 feet, More than 50 kv; 10 feet plus 0.4 inches for each 1 kv over 50 kv; Two times the length of the line insulator, but never less than 10 feet, Less than 50 kv; 10 feet; Two times the length of the line insulator, but never less than 10 feet. A ladder or other safe means of access must be provided. 3.Check that no structural alterations were made. Make sure employees do not use cross-braces as a means of access. All equipment shall be inspected to ensure that it is in good condition and is serviceable. The following table provides the clearance distances between scaffolds and power lines, or any other conductive material, while being erected, used, dismantled, altered or moved. 8. 2.Toss tools and other items from the scaffold. Make sure standpipes, vents, electrical conduit, etc., which may give way under the force of a fall, are not being used as anchorage points. \text { Target } \\ Maximum intended load and load-carrying capacities of scaffolds used. Each end of the platform, unless cleated or otherwise restrained by hooks or equivalent means, shall extend over the centerline of its support at least six inches. Environmental Health and Safety 2. At all points of a scaffold where the platform changes direction, such as turning a corner, any platform that rests on a bearer at an angle other than a right angle shall be laid first, and platforms which rest at right angles over the same bearer shall be laid second, on top of the first platform. Key comparative information for Samsung, Apple, and Google follows. [29 CFR 1926.451 (e) (1)] 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 . Select the correct answer and then click DONE. b. While sitting or kneeling on a fixed deck plank attached to a fabricated frame scaffold, a worker was pulling a 16-foot long 2x4 off the bucket of an excavator. The height of the scaffold in relation to the minimum base width, wind loads, the use of brackets or cantilevered platforms and imposed scaffold load determines the need for stability bracing. 2. Fabricated frame scaffolds are the most common type of scaffold because they are versatile, economical, and easy to use. 4.A bungee cord, Joel, a commercial painter, is working on a new site where he and his team will need to use scaffolding. Any damaged or weakened component of a scaffold must be repaired or replaced immediately. Guardrail systems must be capable of withstanding, without failure, a force of at least 200 pounds applied in a downward or outward direction at any point within two inches of the top edge of the top rail. The competent person is responsible for determining the safety and feasibility of installing and using safe means of access, based on site conditions and the type of scaffold involved. 1.Store materials away from the edge. Additionally, there is no material cohesion; during a storm the material can wash away under the scaffold base plates. must be plumb (exactly vertical) and braced to prevent swaying and displacement. Scaffold planks should extend over their end supports not less than 6 inches nor more than 18 inches. Inspections of scaffolds after changes / alterations have been made. The department also to provide competent person with document indicating that they are competent persons representing their respective departments and shall agree to uphold all local, state, and federal rules and regulations as they relate to scaffolding. When vertical lifelines are used, check to ensure they are fastened to a fixed safe point of anchorage, independent of the scaffold, and are protected from sharp edges and abrasion. The scaffold and its components must be capable of supporting four times the rated load. The standard requires employers to protect each employee on a scaffold more than 10 feet (3.1 m) above a lower level from falling to that lower level. Scaffolds are commonly used in construction work so workers have a safe, stable work platform when work cannot be done at ground level or on a finished floor. Fall protection consists of either personal fall-arrest systems or guardrail systems, and must be provided on any scaffold 10 feet or more above a lower level. 4. All other components must be capable of supporting at least four (4) times the rated load. Direct access is acceptable when the scaffold is not more than14 inches horizontally and not more than 24 inches vertically from the other surfaces. b. Exceptions: Guardrails are not required when: the front end of all platforms are less than 14 inches (36 centimeters) from the face of the work; outrigger scaffolds are 3 inches (8 centimeters) or less from the front edge; or, employees are plastering and lathing 18 inches (46 centimeters) or less from the front edge. b.Two feet c.6 feet After answering all the questions, click on the "Check Quiz Answers" button to grade your quiz and see your score. The top edge height on supported scaffolds manufactured or placed in service before January 1, 2000, and on all suspended scaffolds where both a guardrail and a personal fall arrest system are required shall be between 36 45 inches; When mid-rails, screens, mesh, intermediate vertical members, solid panels, or equivalent structural members are used, they shall be installed between the top edge of the guardrail system and the scaffold platform; When mid-rails are used, they shall be installed at a height midway between the top edge of the guardrail system and the scaffold platform; When screens and mesh are used, they shall extend from the top edge of the guardrail system to the scaffold platform, and along the entire opening between the supports; When intermediate members are used, they shall not be more than 19 inches apart; Each top rail or equivalent member of a guardrail system shall be capable of withstanding a force of at least 100 pounds for systems on single-point adjustable suspension or two-point adjustable suspension scaffolds, and at least 200 pounds for guardrail systems installed on other scaffolds; When the loads specified above are applied in a downward direction, the top edge shall not drop below the height above the platform surface required above; Mid-rails, screens, mesh, intermediate vertical members, solid panels and equivalent structural members shall be capable of withstanding a force of at least 75 pounds for systems with a minimum 100 pound top rail capacity, and at least 150 pounds for systems with a minimum 200 pound top rail capacity; Guardrails shall be surfaced to prevent injury to an employee from punctures or lacerations and prevent snagging of clothing; The ends of all rails shall not overhang the terminal posts except when such overhang does not constitute a projection hazard; Steel or plastic banding shall not be used as a top rail or mid-rail; Manila or plastic (or other synthetic) rope being used for top rails or mid-rails shall be inspected by a competent person as frequently as necessary; and. What is a joint underwriting association (JUA)? Examining the scaffold tag (which should be affixed near the access point) to verify that a competent person has deemed the scaffold safe for use. Two tiebacks installed at opposing angles are required when a perpendicular tieback cannot be installed. Visit the Aerial Work Platforms web page to learn more about the specific requirements for aerial work platform use at Princeton. Because frame scaffolds are the most common type of supported scaffold, this course uses the Fabricated Frame Scaffold to describe requirements that are common to all supported scaffolds. -Make sure it was erected properly -Check that no structural alterations were made -Replace any missing ties or braces A means of access must be provided when the scaffold platform is more than how many feet above or below a point of access? When are workers on scaffolding most vulnerable to fall hazards? b.3 to 1 Erectors and dismantlers face additional access problems due to the incomplete condition of the scaffolding. As they return to the site to continue their work, the first step they should take is to: Utilizing a scaffold on the Princeton University Campus for any reason requires specific involvement with several types of trained individuals. Jayden and his crew are anxious to begin erecting scaffolding at the new job site. Note: Platforms may be coated periodically with wood preservatives, fire retardants, and slip-resistant finishes, provided they do not obscure the top or bottom wood surfaces. d. Four feet. Select the correct answer and then click DONE. Ensure that employees performing overhand bricklaying operations from a supported scaffold are protected from falling from all open sides and ends of the scaffold, except at the side next to the wall Scaffold platforms above one section high must be provided with safe access. Read the material in each section to find the correct answer to each quiz question. a.2 to 1 Using wire to connect bracing is not safe. 3.Use mudsills to provide a firm foundation. \text { Product Information } \\ the forklift is not moved horizontally while the platform is occupied. Select the correct answer and then click DONE. Workers are most vulnerable to fall hazards when climbing on or off a scaffold. Compacted Gravel Roads - This type of road surface may have adequate strength but the material does not provide a smooth surface. \text { Advertisement } d.Two mud sills per leg, Scaffolds must be erected, dismantled, moved, or altered only under the supervision of a(n) ________. foundations are set on base plates, mud sills, and other adequate firm foundations. 1.Make sure it was erected properly. In the event of an emergency, please call 123 from any campus phone or 773.702.8181, Please direct coronavirus (COVID-19) questions tocoronavirusinfo@uchicago.edu. Scaffolds and components must be able to support at least four times the intended load. 3. Be sure employees are able to safely access any level of a scaffold that is 2 feet above or below an access point. The scaffold distance between an insulated 220-volt line must be at least three feet. The victim was climbing the end-frame of a three-tiered metal scaffold when a midrail pulled loose. Cross braces shall not be used as a means of access. What should Ted do? 11. Proper pinning is necessary to make sure the scaffold is steady and does not collapse. being laid. 22 inches Select the correct answer and then click DONE. d.Hearing protection. b. 32 - 36 inches Ensure scaffold platforms and walkways are at least 18 inches wide, unless they are used in areas that are so narrow that they must be less than 18 inches wide. Make sure frames and panels are joined together vertically by coupling or stacking pins or equivalent means. The footing of scaffolding must be sound and rigid, capable of supporting the weight. Acrobat Distiller 7.0.5 (Windows) c.1 1/2 inches What are supported scaffold foundations set on to ensure stability? Check that scaffolds and scaffold components are capable of supporting, without failure, their own weight and at least 4 times their maximum intended load. Horizontal members are erected in a manner that creates a usable ladder and provides good hand hold and foot space. \text { discount; pink or silver; } \\ 3.Avoid kicking or knocking items off the scaffold. Remove ties and braces. Scaffold Training Institute or similar vendor). a safe means of access shall be provided when a competent person has determined the feasibility and analyzed the site . c.10 inches EHS staff Competent person, or qualified person). Ensure frames and panels are locked together to prevent uplift, where uplift can occur. Frequency of the training to be determined by EHS and department management, but should not exceed period of 5 years from the previous training. Employees erecting and dismantling supported scaffolding must have a safe means of access provided when a competent person has determined the feasibility and analyzed the site conditions. Select the correct answer and then click DONE. The end points of the cross bracing must be no more than 48 inches (1.3 meters) apart vertically. 262 Alexander Street 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. \text { Students-back } \\ Sand, gravel, masonry units, rolls of roofing felt, and other such materials shall not be used as counterweights. Manila or synthetic rope used for top rails must be inspected to ensure that the rope meets the strength requirement. The following types of scaffolds are prohibited for use on University property: All employees working on scaffolds six feet or more above ground/floor level shall use fall protection in accordance with the Fall Protection policy. Compacted Soils & Then Frozen - Compacted soils, as with all soils, swell and heave due to moisture content or water contained within the soil. Employee is Pulled off Scaffold, Suffers Injuries-Guardrails May Have Saved Him. Note: A level should be used during assembly to make sure new structural components remain in line. Personal fall arrest systems can be used on scaffolding when there are no guardrail systems. Both A & B (Hooks & Safety latches) Hoists shall be: All of the above Daily inspections need to include: Checking of the wire rope for damage or "caging" Hoists shall be inspected: Daily, prior to use Do not perform maintenance on a conveyor until: All hazardous energies are disconnected and blocked d. Repair any defective scaffolding components. 3. All scaffolding shall have toe boards, screens, a guardrail system and/or debris nets as determined by a competent person. Specific requirements are described below. c.Anyone d.15, 17, Ramps and walkways _______ feet or more above lower levels must have guardrail systems. Supported scaffolds consist of one or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames, or similar rigid support. Crossbraces must not be used as a means of access. Check to make sure scaffold components made of dissimilar metals are not used together, unless a competent person has determined that galvanic action will not reduce the strength, through corrosion, of any component below OSHA standards. b.Yes, because the platform is more than two feet off the ground, or point of access. a.15 feet Make sure no gaps greater than 1 inch are permitted between adjacent planks or deck units, or between the platform and the uprights. The most frequent fall-from-elevation accident is a fall off ladders. However, an evaluation of the deck for its maximum allowable loading would be required, since the decking or deck structure could fail under a full scaffold load. Erectors can solicit materials and components from other employees who may be on the ground, but the ultimate adding / subtracting of components to a scaffold shall be accomplished by an authorized scaffold erector. Rolling scaffold must not be used on sloped surfaces. a.18 inches Make sure all brace connections are properly secured to prevent dislodging. Requirements specific to the other types are described in the next module. front-end loaders and similar pieces of equipment are not used as support scaffold platforms, unless they have been specifically designed by the manufacturer for such use. The lifeline must be attached securely to substantial members of the structure (not the scaffold) or to securely rigged lines that will safely suspend the employee in case of a fall. Inches horizontally and not more than14 inches horizontally and not more than 24 inches from... Fall-From-Elevation accident is a fall off ladders to connect bracing is not than14. Are workers on scaffolding when there are no guardrail systems repaired or replaced immediately a. Or knocking items off the ground, or qualified person ) or synthetic used! 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