"Multi-point adjustable suspension scaffolds, stonesetters' multi-point adjustable suspension scaffolds, and masons' multi-point adjustable suspension scaffolds.". If bridges are not used, passage may be made from one platform to another only when the platforms are at the same height and are abutting. The ropes shall be securely attached to the needle beams. Scaffolds are commonly used in construction work so that workers have a safe, stable platform on which to work when work cannot be done at ground level or on a finished floor. C. Have all brakes and locking devices set when the occupied personnel platform is in stationary position When only a part of the width of the metal scaffold frame conforms to ladder spacing, then these frames must be erected in a manner that makes a continuous ladder bottom to top, with ladder sides of the frames in a vertical line. Be supported by bearing blocks securely attached to the poles. The sheaves of all blocks shall fit the size of the rope used. Each pump jack bracket shall have two positive gripping mechanisms to prevent any failure or slippage. Plan the scaffolding setup a few weeks before the start of the project to make sure the scaffold fits the site. Clipping is a handy way to collect important slides you want to go back to later. If bearing on rungs only, the bearing area shall include a length of at least 10 inches (25.4 cm) on each rung. To determine whether employees need hearing protection, employers have to consider: The loudness of the noise, as measured in decibels. Scaffolds are plumb, square, level and situated on base . Scaffolding means a convenient platform for persons to work at height. 3. When dismantling a scaffold, all work should be conducted: Tube and coupler scaffolds over 125 feet high must be designed by: What type of scaffold other than the tube and coupler scaffold is ideal for use around complex structures? The entire inside face of double-pole scaffolds used to support loads of 50 lbs. Overhead supporting members (roof structure, ceiling beams, or other structural members) shall be inspected and checked for strength before the scaffold is erected. A scaffold is a temporary, elevated platform that construction workers use for working safely at elevations. Resist penetration by objects and absorb the shock of a blow. Boatswains' chair seat slings shall be reeved through four corner holes in the seat; shall cross each other on the underside of the seat; and shall be rigged so as to prevent slippage which could cause an out-of-level condition. Additional requirements applicable to specific types of scaffolds. When horses are arranged in tiers, the legs of each horse shall be nailed down or otherwise secured to prevent displacement. The following requirements do not apply to two-point adjustable suspension scaffolds used as masons' or stonesetters' scaffolds. Diagonal braces shall be installed between squares on the rear and front sides of the scaffold, and shall extend from the bottom of each square to the top of the next square. In the United States and Canada, most scaffolds found at jobsites are made of steel, Passage may be made from one platform to another only when the platforms are at the same height, are abutting, and walk-through stirrups specifically designed for this purpose are used. Wood splice plates shall be provided on at least two adjacent sides, and shall extend at least 2 feet (0.6 m) on either side of the splice, overlap the abutted ends equally, and have at least the same cross-sectional areas as the pole. At holes, guardrail systems must be set up: The top edge of a guardrail must be from 39 to 45 inches above the walking/working level, and there must also be a means of protection from: Falling objects between top rail and walking surface. 4. Cyber Awareness Challenge 2022 Answers And Notes. Scaffolding is a temporary structure that provides support for workers, plants, and materials used in building, construction, maintenance, repair, and demolition work. Each bearer shall be securely fastened to the platform. 2. Bearers shall extend beyond the posts and runners, and shall provide full contact with the coupler. It is used in construction work where the work cannot be done from the ground level. When a wire rope is placed around the structure in order to provide a safe anchorage for personal fall arrest systems used by employees erecting or dismantling scaffolds, the wire rope shall meet the requirements of subpart M of this part, but shall be at least 5/16 inch (0.8 cm) in diameter. Hardware should be included to fasten the planks into place. The scaffold should be plumb, level and square. Scaffolds must be constructed of suitable structural materials. [3] Lift the planks through the scaffold bars and into place. The employer shall ensure that materials shall not be dropped to the outside of the supporting structure. Scaffold casters and wheels shall be locked with positive wheel and/or wheel and swivel locks, or equivalent means, to prevent movement of the scaffold while the scaffold is used in a stationary manner. One who is capable of identifying existing and predictable hazards in the surroundings, or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them is a/n ______________: Providing worker training on the safe use of the equipment being operated is the responsibility of the: To protect against caught-in or -between hazards, a worker should not only avoid wearing loose clothing or jewelry, but also a worker should avoid: Performing maintenance or adjustment on equipment/machinery that hasnt been locked-out. On straight run scaffolds, longitudinal bracing across the inner and outer rows of posts shall be installed diagonally in both directions, and shall extend from the base of the end posts upward to the top of the scaffold at approximately a 45 degree angle. The cross braces shall be of such length as will automatically square and align vertical members so that the erected scaffold is always plumb, level, and square. ( e) Bricklayers' square scaffolds (squares). for construction, the agency estimated that by protecting these millions of workers from A good time to perform these inspections is at the start of the workday to ensure the area is clear for that day's shift. 3. Powder-actuated tools are extremely dangerous, with a firing mechanism similar to that of: If a powder-actuated tool misfires, the employee should: Wait at least 30 seconds, then try firing again. Scaffolding, also called scaffold or staging, is a temporary structure used to support a work crew and materials to aid in the construction, maintenance and repair of buildings, bridges and all other man-made structures.Scaffolds are widely used on site to get access to heights and areas that would be otherwise hard to get to. The mission of the Occupational Safety and Health Administration (OSHA) is: To send every worker home whole and healthy every day. No Free-standing scaffolds be higher than 4 times the minimum base dimension. Crossbracing shall be installed between the inner and outer sets of poles on double pole scaffolds. To secure fair compensation for workers who have been injured in accidents Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the supervision of a scaffold competent person. Two other errors mentioned in this module that often lead to trouble are: Improper maintenance and failure to conduct regular inspections. The type of fall protection required will depend upon: The four main causes of crane accidents are contact with power lines, overturns, falls and mechanical failure. And workers must be trained by a qualified person before they use the scaffold. 5% b. SCAFFOLDS MUST BE ERECTED IN ACCORDANCE WITH DESIGN AND/OR MANUFACTURERS' RECOMMENDATIONS. Electrocution, electric shock, burns, indirect (e.g., a fall from a ladder). Employees are prohibited from working above other employees on the face of a sloped or benched excavation unless: Workers on lower level have overhead protection from falling objects. Runners shall be interlocked on straight runs to form continuous lengths, and shall be coupled to each post. Supports for platforms shall be attached directly to the support stirrup and not to any other platform. Scaffolding must be installed by a competent person, following regulations, the manufacturer's instructions, and good engineering practice. Platforms shall be of the ladder-type, plank-type, beam-type, or light-metal type. Employers must provide employees with effective information and training on hazardous chemicals in their work area: At the time of their initial assignment. Scaffold platforms shall not be placed any higher than the second highest rung or step of the ladder supporting the platform. Note: Except where . There are several important scaffolding design guidelines and safety rules that pertain to working on a scaffold: Guardrails and/or fall arrest systems are mandatory when working over 10 feet up. Bracing shall extend diagonally from the inner or outer posts or runners upward to the next outer or inner posts or runners. feet in the air to build skyscrapers or repair monuments like the Statue of Liberty. Boatswains' chair tackle shall consist of correct size ball bearings or bushed blocks containing safety hooks and properly "eye-spliced" minimum five-eighth (5/8) inch (1.6 cm) diameter first-grade manila rope, or other rope which will satisfy the criteria (e.g., strength and durability) of manila rope. Bearers must extend a minimum of 3 inches over the outside edge of runners. Step 1 Select and prepare the ground area. Any alteration of the original equipment shall be approved by the manufacturer. fabricated frame scaffold, the mobile scaffold, the tube and coupler scaffold, the system scaffold are exposed, and describe at least one method of hazard prevention for Make sure a proper access is provided. Where leveling of the scaffold is necessary, screw jacks or equivalent means shall be used. What the percentage of the construction industry that work on scaffold, Most scaffolds at jobsites are made of what type of material, What are the most frequently used types of scaffolds, The first step in building a scaffold includes a site inspection to do identify what. Ladders are used to provide access to different levels of the scaffold, although sometimes steps will be used to improve safety. The noise exposure measurement your employer makes must include all continuous, intermittent and ______ noise within a range of 80 dB to 130 dB. D. All of the above. . Vehicle mounted devices such as cherry pickers or boot trucks used to get a worker to an elevated position. If the use of a power tool can result in flying sparks, metal shavings, wood chips, splashes, or other debris, workers should: Any man-made cavity, depression, trench or cut in the earths surface formed by earth removal. Only employees need to demonstrate and practice safe manual lifting techniques. or more per square foot. All vehicles used for the transportation of explosives shall have tight floors, and any exposed spark-producing metal on the inside of the body shall be: Covered with wood or other non-sparking material. AEGCPs are implemented on construction sites to oversee: The OSHA standard mandates that any time a worker is at a height of six feet or more, the worker is at risk and needs to be protected. When an employee is using stilts on a large area scaffold where a guardrail system is used to provide fall protection, the guardrail system shall be increased in height by an amount equal to the height of the stilts being used by the employee. disadvantages. employers in workdays not lost. 1926.454 Acceptable fall protection systems allowed include guardrails, safety nets, safety harnesses , positioning device systems and fall restraint systems. Caster stems and wheel stems shall be pinned or otherwise secured in scaffold legs or adjustment screws. Do not force frames or . When wood poles are constructed of two continuous lengths, they shall be joined together with the seam parallel to the bracket. The two steps for avoiding hazards that are always taken before the need for PPE is considered are: The three main scaffold types are aerial lifts, supported scaffolds and: Because using cranes or derricks to hoist personnel poses a serious risk to the employees being lifted, any cranes and derricks that hoist personnel must: Be placed on a firm foundation and be uniformly level within 1 percent of level grade. This means that whatever you're working on won't be tilted or sloped in any way. C. Explosives D. Static electricity gathers outside the circuit. Tensioning of each wire rope used for securing brackets in place or as an anchorage for personal fall arrest systems shall be by means of a turnbuckle at least 1 inch (2.54 cm) in diameter, or by equivalent means. Ensure that all scaffold parts are inspected before use to ensure they are in good repair and suitable for use. Supported scaffold poles, legs . Scaffolding must be erected, dismantled or moved by qualified employees that are supervised by a competent person. The following examp le is based on building a scaffold that is 2.1 x 1.5 m (7 x 5 ft.) x 1 frame high. The entire supporting structure shall be securely braced to prevent any horizontal movement. Chemical manufacturers and importers must convey the hazard information they learn from their evaluations to downstream employers by means of labels on containers and: Under the new HAZCOM/GHS requirements for Safety Data Sheets (SDSs) they must now have 16 total Sections. 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