The scaffold assembly must be designed to comply with Local, State and Federal safety requirements. Manual force used to move the scaffold shall be applied as close to the base as practicable, but not more than 5 feet (1.5 m) above the supporting surface. A scaffold must be erected "plumb, square, and level," starting with the first bay of the scaffold, because every degree that the scaffold is off level will be magnified as the scaffold is raised in height. Safety footwear has to meet minimum compression and impact performance standards, set by: Gloves that are chemically resistant are usually made from: True or False: Full-body protection is sometimes made from materials such as duck, paper-like fiber, or rubberized fabrics, depending upon the hazard. 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. Click here to review the details. All diagonal . No employee is on any part of the scaffold which extends outward beyond the wheels, casters, or other supports. Scaffolding means a convenient platform for persons to work at height. Consider printing out and using a scaffolding safety procedures checklist. Ladder Jack Scaffold. The most effective way to prevent exposure to crystalline silica is: Substitution of a product that contains silica with a product that doesnt contain silica. Building ties shall be installed at the bearer levels between the transverse bracing and shall conform to the requirements of 1926.451(c)(1). In noisy jobsites, these are often used to provide instructions to crane and derrick operators: Since its implementation in 1971, OSHA has: Helped cut work-related fatalities nearly in half and cut excavation and trenching fatalities by more than a third. Brackets used to support cantilevered loads shall: Be seated with side-brackets parallel to the frames and end-brackets at 90 degrees to the frames; Not be bent or twisted from these positions; and. Review the foundation. Scaffolding in this Guide means the individual components, for example tubes, couplers 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. (Hold the cups up to your cheeks to tell.) Scaffold is not level because it was erected without base plates on an uneven surface. OSHA MODULE 5 Scaffolds The site owner may have set restrictions that prevent you from accessing the site. . The bottom runners and bearers shall be located as close to the base as possible. 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 Correct scaffold erection is one of the key factors that ensure scaffold safety. General. All brace connections shall be secured. Choose one answer. No handhold available. scaffold, and the suspended scaffold. Crawling Board. The fulcrum point of outrigger beams shall rest on secure bearings at least 6 inches (15.2 cm) in each horizontal dimension. Scaffolds may only be designed, set up, used, or maintained in accordance with: 1926.452 (c) (4) 1926.452 - Additional requirements applicable to specific types of scaffolds. missing parts due to area obstructions). Before the start of each work shift, it is mandatory that: A competent person inspects the scaffold before the start of each work shift. There are many other scaffolds in use as well, each with advantages and It is used in construction work where the work cannot be done from the ground level. It provides a safe and stable platform for workers. Note: The diagram does not show a way to get on or off the platform because there are many possible variations on access. 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. C. Any square or rectangular trench with a width that does not exceed 15 feet Special operations and avoidance techniques Light metal-type platforms having a rated capacity of 750 pounds or less and platforms 40 feet (12.2 m) or less in length shall be tested and listed by a nationally recognized testing laboratory. In the United States and Canada, most scaffolds found at jobsites are made of steel, Runners shall extend over a minimum of two poles, and shall be supported by bearing blocks securely attached to the poles. The original scaffold layout is still feasible. Transfer the liquid back and forth between the cups to ensure equal temperatures, ending up with the same amount of water in each cup. 1926.452 (c) (3) Frames and panels shall be joined together vertically by coupling or stacking pins or equivalent means. 7. 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. Hardware should be included to fasten the planks into place. Posts must be accurately spaced, erected on suitable bases, and maintained plumb. When platforms are being moved to the next level, the existing platform shall be left undisturbed until the new bearers have been set in place and braced, prior to receiving the new platforms. The entire supporting structure shall be securely braced to prevent any horizontal movement. Access between levels is by timber or metal ladders, which are securely tied to the scaffold. D. Static electricity gathers outside the circuit. 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. Scaffolds shall not exceed three tiers in height, and shall be so constructed and arranged that one square rests directly above the other. The ground is level and stable. In 1996, when OSHA issued the revised Scaffold Standard An access ladder or equivalent safe access must be provided. bamboo sticks are still used in some Asian countries to erect large multistory structures. 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). Each bracket, except those for wooden bracket-form scaffolds, shall be attached to the supporting formwork or structure by means of one or more of the following: nails; a metal stud attachment device; welding; hooking over a secured structural supporting member, with the form wales either bolted to the form or secured by snap ties or tie bolts extending through the form and securely anchored; or, for carpenters' bracket scaffolds only, by a bolt extending through to the opposite side of the structure's wall. Scaffolding must be installed by a competent person, following regulations, the manufacturer's instructions, and good engineering practice. Wooden bracket-form scaffolds shall be an integral part of the form panel. 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. Bearers shall extend beyond the posts and runners, and shall provide full contact with the coupler. Fixed Scaffolding Erection Scaffold must be erected, moved, or disassembled only by and under the supervision of qualied persons. Introduction Scaffolds over 125 feet (38.0 m) in height above their base plates shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with such design. Where uplift can occur which would displace scaffold end frames or panels, the frames or panels shall be locked together vertically by pins or equivalent means. 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. Electricity travels in closed circuits, and its normal route is through a conductor. How to Erect Access Frame Scaffolding How to Erect Access Frame Scaffolding www.worksafebc.com Select . We've updated our privacy policy. Using scaffolds properly can help prevent workplace accidents and injuries. 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. Scaffolding by UWM 1. Position the first level of bracing as close to the base as possible. ", "Form scaffolds and carpenters' bracket scaffolds. B. Use of fall protection above 10 feet. aluminum, or less commonly, wood. . Prior to starting all demolition operations, OSHA 1926.850 (a) requires that an engineering survey of the structure be conducted by a competent person. Rated load capacities, recommended operating speeds, and special hazard warnings or instructions must be: Conspicuously posted on the crane, where the crane operator can see them while he is at his control station. When erected and used properly, it serves its function well. (w) of appendix A to this subpart; "Stilts." Platform units shall be securely attached to the needle beams by bolts or equivalent means. Ray ID: 7a19bde4e8771d14 Other requirements are listed Scaffolds must be designed by a professional engineer in the following situations: Supported scaffolds exceeding: fifteen metres in height above their base support; or Scaffolds are plumb, square, level and situated on base . 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. Be used only to support personnel, unless the scaffold has been designed for other loads by a qualified engineer and built to withstand the tipping forces caused by those other loads being placed on the bracket-supported section of the scaffold. C. Have all brakes and locking devices set when the occupied personnel platform is in stationary position Braces, bearers, and runners shall not be spliced between poles. Catenary Scoffold. Clipping is a handy way to collect important slides you want to go back to later. Where wooden poles are spliced, the ends shall be squared and the upper section shall rest squarely on the lower section. As an example, even in this day of steel and iron, scaffolds made from Activate your 30 day free trialto continue reading. Guardrails should be between 38" and 45" high. Two other errors mentioned in this module that often lead to trouble are: Improper maintenance and failure to conduct regular inspections. Cross braces must keep the scaffold plumb, level, and square; All brace connections must be secured to prevent dislodging; Frames and panels must be joined together vertically by coupling or stacking pins or equivalent means; Frames and panels must be locked together to prevent uplift (separation of a Work benches shall not be used as scaffold platforms. D. All of the above. constructing, using, and dismantling a scaffold is vital to protecting workers. Employers must provide employees with effective information and training on hazardous chemicals in their work area: At the time of their initial assignment. Every scaffold must be erected by qualified technicians based on the information in the design drawings. Transverse bracing forming an "X" across the width of the scaffold shall be installed at the scaffold ends and at least at every third set of posts horizontally (measured from only one end) and every fourth runner vertically. PLUMB/LEVEL/SQUARE. Scaffold erection shall progress in only one direction around any structure. Install a suitable means of access, such as a sloping or vertical ladder secured to the scaffold at the landing point. Note: Except where . Not tied. We've encountered a problem, please try again. 4. Scaffolds, once properly erected, are a control measure to prevent the risk of persons and objects falling when working at height. Symptoms of silicosis ____________ , so workers should have a chest x-ray to see if there is lung damage. Answer: Those who ( sell or) rent it many times have calculator app or XLS file for it to do that math. Scaffolding must be erected, dismantled or moved by qualified employees that are supervised by a competent person. Scaffolding Injuries Approximately 2.3 million construction workers work on scaffolds regularly. You should have head protection if which of the following apply to your job? Add several tablespoons of table salt to one cup and stir. 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a scaffold must be erected plumb, square, and level because