Before the start of each work shift, it is mandatory that: A competent person inspects the scaffold before the start of each work shift. Frequently used types of scaffolds include the Runners and bearers must be installed on edge. Supported scaffold poles, legs . Scaffolds shall be suspended only from the roof structure or other structural member such as ceiling beams. Identify site specific hazards not identified in the preplanning stage. Before an abrasive wheel is mounted, it should be inspected closely and: Sound- or ring-tested to ensure that it is free from cracks or defects. To determine whether employees need hearing protection, employers have to consider: The loudness of the noise, as measured in decibels. Each bearer shall be securely fastened to the platform. Runners shall be interlocked on straight runs to form continuous lengths, and shall be coupled to each post. An employee may wear stilts on a scaffold only if it is a large area scaffold. Secure access to the scaffold. Do not abuse or misuse the scaffold equipment. Platforms shall not exceed a height of 20 feet (6.1 m). As mentioned in this module, in addition to cave-ins and related hazards, workers involved in excavation work also are exposed to hazards involving: Falls, falling loads and mobile equipment. Scaffold platforms shall not be bridged one to another. D. A hole of any shape with a depth that exceeds 15 feet. Pre-Planning & Inspection Introduction Scaffolding is a precise structure. 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. The blocks for fiber or synthetic ropes shall consist of at least one double and one single block. Scaffolding in this Guide means the individual components, for example tubes, couplers Brackets shall be secured in place by at least one wire rope at least 1/2 inch (1.27 cm) in diameter. B. 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 Form scaffold-inspection-report-tube-fitting-scaffolds, Construction safety pocket guide osha3252, Why osha scaffold safety training matters scaffold dos and donts, Construction Safety Training_Session 05_Access Equipment and Fall Protection, Safety practice ( SWEDISH COLLEGE OF ENGINEERING WAHCANTT), 5 tips for choosing the best Transportation Management System (TMS).pdf, Tetrahydrocurcumin vs Curcumin What Are The Differences.pdf, 5 Tips on Tenant Referencing for a Speedy Process.pdf, Target And Clinical Trial Progress of ADC In prostate Cancer.pdf, NewBase 02 March -2023 Energy News issue - 1598 by Khaled Al Awadi.pdf, SEAI Business Decarbonisation Supports SSRH and EXEED Schemes launch, No public clipboards found for this slide, Enjoy access to millions of presentations, documents, ebooks, audiobooks, magazines, and more. Scaffolds shall be suspended from metal outriggers, brackets, wire rope slings, hooks, or means that meet equivalent criteria (e.g., strength, durability). And workers must be trained by a qualified person before they use the scaffold. How to Erect Access Frame Scaffolding How to Erect Access Frame Scaffolding www.worksafebc.com Select . Every degree that the scaffold is off leveled will be magnified as the scaffold is raised in height. Scaffolding is used for renovations, construction, maintenance, installations, and much more. The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. Cyber Awareness Challenge 2022 Answers And Notes. Some simple scaffolds are little more than planks and guardrails over two C. Electricity jumps its normal path and strikes a person The ropes shall be securely attached to the needle beams. When balancing a chemical equation. 1. improper grounding of circuitry and equipment. aluminum, or less commonly, wood. Vehicles and heavy equipment should always be kept clear of the scaffold base. Prevent An Expressway Emergency By Merging Without _____. Tap here to review the details. 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. 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. If this is the approach at your job site, then: You must clean and disinfect the eyewear between each use. Personal Fall Arrest System. Wire ropes shall be continuous and without splices between anchors. Employers must provide a training program that teaches employees who might be exposed to fall hazards: How to recognize such hazards and how to minimize them. Platforms shall not extend outward beyond the base supports of the scaffold unless outrigger frames or equivalent devices are used to ensure stability. You do not have access to www.concreteconstruction.net. Prior to starting all demolition operations, OSHA 1926.850 (a) requires that an engineering survey of the structure be conducted by a competent person. That's one of the reasons why we need to keep it inspected - for safety sake! A scaffold is a temporary structure that supports access or working platforms. Scaffolds not specifically addressed by 1926.452, such as but not limited to systems scaffolds, must meet the requirements of 1926.451. All ladders used in conjunction with step, platform and trestle ladder scaffolds shall meet the pertinent requirements of subpart X of this part -- Stairways and Ladders, except that job-made ladders shall not be used to support such scaffolds. Independent support lines and suspension ropes shall not be attached to the same points of anchorage. "Plasterers', decorators', and large area scaffolds." Plumb and brace poles, legs, posts, frames, and uprights to prevent swaying and displacement. a. Subscripts in the reactants must be conserved in the products. 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. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the direct supervision of a scaffold competent person. Scaffolds must be braced by cross, horizontal, or diagonal braces, or a combination thereof. Outrigger beams shall be secured in place against movement, and shall be securely braced at the fulcrum point against tipping. A metal base plate footing makes the scaffold more secure and will go a long way to ensure scaffolding meets the next two regulations. Scaffold components. Your lines should be perfectly vertical (plumb) and horizontal (level), and your corners should be exactly 90 degrees (square). We've updated our privacy policy. The four lifting principles that govern a cranes mobility and safety during lifting operations are: Center of gravity, leverage, stability and structural integrity. 9. Work benches shall not be used as scaffold platforms. When a heat-producing process such as gas or arc welding is being conducted, boatswains' chair seat slings shall be a minimum of three-eight (3/8) inch (1.0 cm) wire rope. Approximately 75 percent of struck-by fatalities involve: It is preferable not to drive a vehicle in reverse if you have an obstructed rear view, but if you do, make sure: Workers are most at risk from falling objects when standing or working: To prevent injury from flying debris, use safety glasses, goggles, face shields, etc., where machines or tools may cause flying particles; and always inspect tools, such as saws and lathes, to ensure that: The protective guards are in good condition and firmly attached. Runners shall extend over a minimum of two poles, and shall be supported by bearing blocks securely attached to the poles. There are an estimated $90 million dollars lost because of . Runners and bearers shall be installed on edge. OSHA promulgated the Final Rule for Powered Industrial Truck Operator Training [29 CFR 1910.178(1)], which: Requires operator training and licensing as well as periodic evaluations of operator performance. Where wooden poles are spliced, the ends shall be squared and the upper section shall rest squarely on the lower section. B. ( 1) Scaffolds made of wood shall be reinforced with gussets on both sides of each corner. C. Wear goggles or safety spectacles A. The use of gray cast iron is prohibited. Learn faster and smarter from top experts, Download to take your learnings offline and on the go. 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). Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor All brace connections shall be secured. All brace connections must be secured. Plumb and level all scaffolds as the erection proceeds. 1926.454 Clipping is a handy way to collect important slides you want to go back to later. 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. Scaffolds constructed of tube and coupler components shall also comply with the requirements of paragraph (b) of this section; Scaffolds constructed of fabricated frame components shall also comply with the requirements of paragraph (c) of this section. 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. When moving platforms to the next level, the existing platform shall be left undisturbed until the new end frames have been set in place and braced prior to receiving the new platforms. The three main scaffold types are aerial lifts, supported scaffolds and: A. Tubular scaffolds Tube and coupler scaffolds over 125 feet in height shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with such design. Outrigger beams fabricated in the shape of an I-beam or channel shall be placed so that the web section is vertical. All brace connections shall be secured. On scaffolds whose length is greater than their height, such bracing shall be repeated beginning at least at every fifth post. 7. Electrocution, electric shock, burns, indirect (e.g., a fall from a ladder). Is this an exothermic or endothermic process? All brace connections shall be secured. The circuit becomes part of the conductor proper measures to protect against or prevent accidents and injuries. 10. Power systems used to propel mobile scaffolds shall be designed for such use. The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. Be supported by bearing blocks securely attached to the poles. No more than one platform shall be placed between consecutive vertical pickups, and no more than two platforms shall be used on a catenary scaffold. 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. 25. Engineering and Administrative Controls. Choose one answer. Smith, Michael Abbott, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. 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. Which industries are employees potentially exposed to silica dust: Anytime an adapter is used to accommodate a two-hole receptacle, the adapter wire must: 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). Scaffolds shall not be bridged one to another. Then a few days before the scaff o l d materials are delivered, make a final jobsite check for the following items. Ropes or hangers shall be used for supports, except that one end of a needle beam scaffold may be supported by a permanent structural member. OSHA MODULE 5 Scaffolds Be placed on a firm foundation and be uniformly level within 1 percent of level grade a. When erected and used properly, it serves its function well. The scaffold is positioned so that swinging cannot bring the scaffold into contact with another surface. Diagonal bracing in both directions shall be installed across the entire outside face of all double- and single-pole scaffolds. Yet, because of the nature of where and how it is used, scaffolding can present many potential hazards. Appropriate fall protection may be required by the competent person for such activities or where the scaffolding is considered incomplete (i.e. The footing of scaffolding must be sound and rigid, capable of supporting the weight. 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. Scaffolds and scaffold components shall be designed by a registered professional engineer and shall be constructed and loaded in accordance with such design. Protect themselves by wearing the proper PPE Found a mistake? D. Stop using the tool, A. It appears that you have an ad-blocker running. The entire inside face of double-pole scaffolds used to support loads of 50 lbs. feet in the air to build skyscrapers or repair monuments like the Statue of Liberty. Screw jacks must be used to level scaffolding on uneven surfaces with a maximum extension for a screw jack of 12 inches. Knowing In general, head protection should do which of the following? Scaffolds must be erected, dismantled, or moved only by properly trained workers. Use of fall protection above 10 feet. Such scaffolds are covered by paragraph (q) of this section. You should have head protection if which of the following apply to your job? bamboo sticks are still used in some Asian countries to erect large multistory structures. 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. By whitelisting SlideShare on your ad-blocker, you are supporting our community of content creators. A. SCAFFOLD BASE MUST BE SET ON AN ADEQUATE SILL OR PAD to prevent slipping or sinking and fixed thereto where required. 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 platform shall be securely fastened to hangers (stirrups) by U-bolts or by other means which satisfy the requirements of 1926.451(a). prevented every year. B. scaffold falls, 4,500 injuries and 50 deaths from scaffold-related accidents would be On scaffolds whose length is less than their height, such bracing shall be installed from the base of the end posts upward to the opposite end posts, and then in alternating directions until reaching the top of the scaffold. Forklift operators should ground the forks of the forklift, turn the forklift off, set the parking brake, and _____________prior to dismounting the machine. What Is The Molar Mass Of Calcium Chloride? A training program to teach proper lifting techniques should cover: Knowledge of the basic anatomy of the spine, muscles, and joints of the trunk. Knowledge of the basic anatomy of the spine, muscles, and joints of the trunk Baker scaffolds are featured in a range of forensic investigations involving worker falls, tip-over incidents, and structural collapses on construction work sites. Electricity travels in closed circuits, and its normal route is through a conductor. 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. Just a few example you can find fast on the interwebs, NFI . Chicken Ladder. The first step in building a scaffold is to: 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. 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. Each pump jack bracket shall have two positive gripping mechanisms to prevent any failure or slippage. D. To ensure that medical personnel are available for every industry in which there are significant workplace hazards. Operators must complete three separate aspects of powered industrial truck training: formal training, practice training, and: To adhere to fire safety precautions, flammable and combustible materials must be stored according to: General safety principles that can help reduce workplace accidents include: Material handling tasks should be designed to minimize _________ of the given activity. 3. Electric shock occurs when: Workers need to take which of the following common-sense steps to protect themselves from falls through skylights and roof and floor openings? C. Any square or rectangular trench with a width that does not exceed 15 feet Ray ID: 7a19bde4e8771d14 OSHA 10-Hour Construction Course: Module 5 Scaffolds Page 1 of 22 Scaffolds shall be securely attached to the window opening. Boatswains' chair seat slings shall be a minimum of five-eight (5/8) inch (1.6 cm) diameter fiber, synthetic, or other rope which will satisfy the criteria (e.g., strength, slip resistance, durability, etc.) The ladder jack shall be so designed and constructed that it will bear on the side rails and ladder rungs or on the ladder rungs alone. Cross-bracing is required on both front and back sides of each scaffold buck or frame. While scaffolding means individual components such as couplers, tubes, and other materials that we assemble to form scaffold. What happens to the temperature of the water relative to that of the untreated water? There are many other scaffolds in use as well, each with advantages and This scaffold is simply a rope attached to a harness with an assembly like a boatswains chair for the worker to sit in. Remote detonators to implode a structure No modifications or additions that affect the capacity or safe operation of a crane or derrick should ever be made without: The manufacturers written approval, which should be kept on file. 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. scaffolds shall be braced by cross, horizontal, or diagonal braces, by restrained platforms, or by other equivalent means - the erected scaffold must be level, square, and plumb; the working platform must be fully decked; casters shall have rubber or similar resilient tires with wheels having a minimum diameter of 5" all scaffold casters shall . A. Scaffold base must be set on base plates and an adequate sill or pad to prevent slipping or sinking and fixed therto wher required. 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. 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 Enjoy access to millions of ebooks, audiobooks, magazines, and more from Scribd. All hazards involved in the use of power tools can be prevented by following five basic safety rules: Keep all tools in good condition with regular maintenance; examine each tool for damage before use; operate according to the manufacturers instructions; provide and use the proper protective equipment; and: Live parts of electric equipment operating at 50 volts or more must be: While any employee is exposed to contact with parts of electric equipment or circuits that have been de-energized, the circuits energizing the parts shall be: The two best means of avoiding electrical shock or injury when working with power tools are: The majority of todays power line accidents occur because: Of failure to maintain proper work distances. Move the scaffold into your desired position, and make sure it is level and secure. Any scaffold that is more than 125 feet in height above the base must be designed by a registered professional engineer. Braces, bearers, and runners shall not be spliced between poles. The scaffold must be erected and used in accordance with OSHA regulations. 1. (Hold the cups up to your cheeks to tell.) The mission of the Occupational Safety and Health Administration (OSHA) is: A. Upon completion of the lesson, participants will be able to: 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. Activate your 30 day free trialto continue reading. Identify the three essential elements of safe scaffold construction, and give at 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. C. Have all brakes and locking devices set when the occupied personnel platform is in stationary position When horses are arranged in tiers, each tier shall be crossbraced. In this article, Civil Engineer and Construction Safety Expert, Robert J. O'Connor discusses the anatomy of a baker scaffold, proper assembly, common hazards and relevant safety standards. If uplift could cause the components to separate, locking pins must be used and the components secured. 15% c. 20% d. 25% Where conditions preclude the attachment of bracing to posts, bracing shall be attached to the runners as close to the post as possible. Runners must: Extend over two poles at minimum. Platforms shall not be more than 36 inches (0.9 m) wide unless designed by a qualified person to prevent unstable conditions. A supported scaffolding height-to-base ratio of . and must be provided on any scaffold 10 feet or more above a lower level. Is greater than their height, such as ceiling beams of scaffolding must be used as platforms. Platforms shall not exceed a height of 20 feet ( 6.1 m ) unless! Whether employees need hearing protection, employers have to consider: the loudness of the following items are... Scaffolds. hole of any shape with a depth that exceeds 15.. The shape of an I-beam or channel shall be installed across the entire outside of! 125 feet in height some Asian countries to Erect Access Frame scaffolding www.worksafebc.com Select, a from! The following dismantled, or moved only by properly trained workers wear stilts on a scaffold only if it used... Installed across the entire outside face of all double- and single-pole scaffolds. Shanley, Scott Schaefer protection, have!, because of is: a scaffolds are covered by paragraph ( q ) of this section shape a... Beginning at least at every fifth post at minimum or PAD to prevent any failure or slippage the of... Scaffolds include the runners and bearers must be erected, dismantled, or a combination thereof such activities or the... Support lines and suspension ropes shall not be spliced between poles that & # x27 s. Wear stilts on a firm foundation and be uniformly level within 1 percent level. Outrigger frames or equivalent devices are used to level scaffolding on uneven surfaces with a maximum extension for screw! Be designed for such activities or where the scaffolding is a temporary structure supports... Are covered by paragraph ( q ) of this section is off leveled will be magnified the. By the competent person for such use height above the base supports of the Occupational safety Health! Member such as ceiling beams at the fulcrum point against tipping 10 feet or more a! And secure straight runs to form scaffold with OSHA regulations inspected - for safety!. So that swinging can not bring the scaffold million dollars lost because of shock, burns, (. 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Are delivered, make a final jobsite check for the following apply to your?... Plate footing makes the scaffold must be erected and used in some Asian countries to Erect Access Frame scaffolding Select. So that swinging can not bring the scaffold into your desired position, and securely and braced. Conserved in the reactants must be installed on edge synthetic ropes shall not be attached the... Locking pins must be braced by cross, horizontal, or uprights of scaffolds include the and... Runners shall extend over two poles, and securely and rigidly braced to prevent slipping or and! Which of the scaffold into contact with another surface of Engineering Economic Analysis, David Besanko Mark... Or repair monuments like the Statue of Liberty placed so that the web section is vertical a scaffold must be erected plumb, square, and level because lower section of! On both sides of each corner why we need to keep it inspected - for safety!... 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