a scaffold must be erected plumb, square, and level because

Save my name, email, and website in this browser for the next time I comment. Employers must provide employees with effective information and training on hazardous chemicals in their work area: At the time of their initial assignment. Review the foundation. A scaffold should always be erected: Choose one answer. Weve updated our privacy policy so that we are compliant with changing global privacy regulations and to provide you with insight into the limited ways in which we use your data. A ground-fault circuit interrupter (GFCI) protects workers from shock by: Matching the amount of current going into an electrical device against the amount returning from the device and shutting down power if a ground fault is detected. When horses are arranged in tiers, each tier shall be crossbraced. The ladder must extend 1 m (3 ft.) above the landing. Consider printing out and using a scaffolding safety procedures checklist. Secure access to the scaffold. The SlideShare family just got bigger. By whitelisting SlideShare on your ad-blocker, you are supporting our community of content creators. Move the scaffold into your desired position, and make sure it is level and secure. The sheaves of all blocks shall fit the size of the rope used. B. The scaffold must be plumb, level and squared wi th all brace connections securely fastened. A scaffold must be erected "plumb, square, and level," because: If a scaffold is built even a few degrees off plumb, the resulting instability could cause the weight of the scaffold to shift, potentially causing the overloading of one leg and the eventual collapse of the scaffold. B. This means guardrails, a personal fall arrest system or both, depending on the situation. The body becomes part of the circuit All ladders used to support ladder jack scaffolds shall meet the requirements of subpart X of this part -- Stairways and Ladders, except that job-made ladders shall not be used to support ladder jack scaffolds. Simple pretensioned beams and slabs of spans up to about 7 meters (23 feet): Can be demolished in a manner similar to ordinary reinforced concrete, True or False: Electrical detonators can be inadvertently triggered by stray RF (radio frequency) signals from two-way radios. 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. work on scaffolds frequently. Each has 1926.451(a)(1) and (3) TrainingEmployers must train each employee who works on a scaffold on the hazards and the procedures to control the hazards. Place the planks. Non-mandatory Appendix A to this subpart contains examples of criteria that will enable an employer to comply with design and loading requirements for pole scaffolds under 60 feet in height. Wire ropes shall not be tightened to the extent that the application of a scaffold load will overstress them. To prevent their displacement, platform units shall be nailed, bolted, or otherwise secured to outriggers. Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. potential hazards that employers and workers need to be aware of so they can take the Two other errors mentioned in this module that often lead to trouble are: Improper maintenance and failure to conduct regular inspections. Finally, while the scaffold is being erected or dismantled, the workers who are performing that task need a safe access. Suspension scaffold rigging must at least 6 times the intended load. Identify the three essential elements of safe scaffold construction, and give at A metal base plate footing makes the scaffold more secure and will go a long way to ensure scaffolding meets the next two regulations. ", "Form scaffolds and carpenters' bracket scaffolds. for construction, the agency estimated that by protecting these millions of workers from Bearers shall extend beyond the posts and runners, and shall provide full contact with the coupler. Splice plates of other materials of equivalent strength may be used. Personnel hoisting platforms must be designed by: A qualified engineer, or another competent specialist qualified in structural design. Surfaces on which stilts are used shall be flat and free of pits, holes and obstructions, such as debris, as well as other tripping and falling hazards. Any scaffold that is more than 125 feet in height above the base must be designed by a registered professional engineer. Erected scaffolds should be continually inspected by users to be sure that they are maintained in safe condition. As an example, even in this day of steel and iron, scaffolds made from 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 scaffold must be erected and used in accordance with OSHA regulations. Ensure that all scaffold parts are inspected before use to ensure they are in good repair and suitable for use. To ensure scaffolding safety, the scaffold must be built under the supervision of a competent person; someone who has been thoroughly trained on safe work practices when working on scaffoldings. Vehicle mounted devices such as cherry pickers or boot trucks used to get a worker to an elevated position. We need to follow scaffolding safety procedures. You might get some help from www.HelpWriting.net Success and best regards! When the pump jack has to pass bracing already installed, an additional brace shall be installed approximately 4 feet (1.2 m) above the brace to be passed, and shall be left in place until the pump jack has been moved and the original brace reinstalled. ( e) Bricklayers' square scaffolds (squares). Diagonal bracing in both directions shall be installed across the entire outside face of all double- and single-pole scaffolds. B. a scaffold must be erected plumb, square and level because [, A space of at least 3 inches between handrails, or stair rails used as handrails, and other objects. That's one of the reasons why we need to keep it inspected - for safety sake! Keep Vehicles and Heavy Equipment Clear. 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. Because of this, the following is required: A certified crane operator must be used. True or False: Once a fall protection device has been inspected by a competent person and deemed safe for use by an employee, it is up to the employee to inspect it regularly and ensure that it still meets OSHA requirements. If a machine has an exposed pulley and conveyor but the portion of it that is exposed is well underneath the machine, the employer: Must ensure all exposed and accessible sections of the machine are guarded. You've requested a page on a website (cloudflarepreview.com) that is on the Cloudflare network. We've encountered a problem, please try again. Stilts shall be properly maintained. Scaffold brackets shall be constructed to fit the pitch of the roof and shall provide a level support for the platform. 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. Damaged or deteriorated equipment must not be used USA (v. 2008) 21 Erecting Scaffolding Erect plumb, square and rigid with all brace connections securely fastened USA (v. 2008) 22 Tubular Welded-frame Scaffolds Be sure scaffold stays plumb and level as erection progresses For mobile scaffolds, use a horizontal diagonal brace, for When only two ropes are used with each float: They shall be arranged so as to provide four ends which are securely fastened to overhead supports. The maximum permissible span for 2 X 10 inch or wider planks is shown below in "Material." . The ground is level and stable. 6. Nothing should lean in any direction. B. A noise level of 95 dB is ______ than the lowest level at which hearing protection is required (85 dB), and your exposure should be limited to six hours or less. Free access to premium services like Tuneln, Mubi and more. The inboard end of outrigger beams, measured from the fulcrum point to the extreme point of anchorage, shall be not less than one and one-half times the outboard end in length. As a general rule, a scaffold becomes inherently unstable once its height is four times its minimum base dimension, even if it is plumb and square. The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. Scaffolding Injuries Approximately 2.3 million construction workers work on scaffolds regularly. No Free-standing scaffolds be higher than 4 times the minimum base dimension. Supports for platforms shall be attached directly to the support stirrup and not to any other platform. The checks above are common scaffolding faults to look out for that show you the scaffold structure is unsafe. CapacityScaffolds and scaffold components must support at least 4 times the maximum intended load. Activate your 30 day free trialto unlock unlimited reading. Scaffolds have been around for thousands of years, and there are myriad types and We thoroughly check each answer to a question to provide you with the most correct answers. The footing of scaffolding must be sound and rigid, capable of supporting the weight. A. True or False: Before the advent of OSHA, a cohesive system of separate rules existed that effectively governed the American workplace. fScaffolding A registered professional engineer must design and certify scaffolds: with wood poles and over 60 feet in height frame scaffolds over 125 feet in height outrigger scaffolds plus scaffold erections when intended loads exceed tube and coupler scaffold standard ratings USA (v. 2008) fTypes of Scaffolds USA (v. 2008) fSupported Scaffolds C. Both A and B Scaffolds are fabricated from many materialssome common, and others not so These hooks shall be so placed that they will prevent the platform from falling if one of the horizontal wire ropes breaks. Scaffolds are plumb, square, level and situated on base . Scaffolding must not be placed on unstable objects, such as bricks or blocks. Uplift might be caused by the action of wind on a secured deck or by the leverage action of a cantilever side bracket on the scaffold. Some simple scaffolds are little more than planks and guardrails over two You should have head protection if which of the following apply to your job? When erected and used properly, it serves its function well. Scaffolding must be installed by a competent person, following regulations, the manufacturer's instructions, and good engineering practice. Employers must: Ensure that the safety monitor is a competent person knowledgeable about fall protection. 1. The circuit becomes part of the conductor 25. Scaffolding is used for renovations, construction, maintenance, installations, and much more. The upper tiers shall stand on a continuous row of planks laid across the next lower tier, and shall be nailed down or otherwise secured to prevent displacement. Runners shall be erected along the length of . Every element of your orientation must be exact. Non-cross-laminated wood boatswains' chairs shall be reinforced on their underside by cleats securely fastened to prevent the board from splitting. uses. This instability causes the weight to shift from one leg to another and could cause the overload of the leg and the collapse of the scaffold. 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. Each wire rope used for securing brackets in place or as an anchorage for personal fall arrest systems shall be protected from damage due to contact with edges, corners, protrusions, or other discontinuities of the supporting structure or scaffold components. 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. All planking must be Scaffold Grades, or equivalent, as recognized by approved grading rules for the species of wood used. 7. All brace connections shall be secured. "Plasterers', decorators', and large area scaffolds." Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor. Plumb and brace poles, legs, posts, frames, and uprights to prevent swaying and displacement. Prior to starting all demolition operations, OSHA 1926.850 (a) requires that: One of the most important elements of the pre-job planning is: Proper equipment for prompt transportation of an injured worker, as well as a communication system to contact any necessary ambulance service, must be available: A structural material with tensioned steel strands embedded inside, which compress the concrete and give it extra strength. Using cranes to hoist material can have serious consequences if the process is not performed properly. Which of these is required if the workers body, hands or clothing may come into contact with moving parts? Step 1 Select and prepare the ground area. 5. A staging area is available. 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. A scaffold is a temporary, elevated platform that construction workers use for working safely at elevations. Independent support lines and suspension ropes shall not be attached to the same points of anchorage. Float Scaffold. The scaffold should be plumb, level and square. Faults: Damaged. and that cross braces are of such length as will automatically keep the scaffold plumb, level, and square. Runners shall be installed along the length of the scaffold, located on both the inside and outside posts at level heights (when tube and coupler guardrails and midrails are used on outside posts, they may be used in lieu of outside runners). Scaffold components. Ladders used to support step, platform, and trestle ladder scaffolds shall be placed, fastened, or equipped with devices to prevent slipping. Any alteration of the original equipment shall be approved by the manufacturer. Employees are plastering an lathing 18 inches or less from the front of the edge, What type of scaffolds you should not use, What is another don't that you should remember, Not to load scaffolds or scaffold components in excess of their maximum intended loads or rated capacities, which ever is less, OSHA 1926.454 (c) states: when an employer gas reason to believe that an employee lacks the skill or understanding needed for safe work involving the erection, use or dismantling of scaffolds, the employer shall, Retrain each such employee so that the requisite proficiency is regained, 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, This scaffold is simply a rope attached to a harness with an assembly like a boatswain's chair for the worker to sit in, If a worker on a scaffold can fall more than 10 feet, they must be protected by guardrails and or personal fall arrest systems(PFAS).The type of fall protection required will depend upon, Final Exam OSHA 10 hour construction program, Introduction to Chemical Engineering Thermodynamics, Hendrick Van Ness, J.M.

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