At least one copy of the design shall be maintained at the jobsite during construction of the protective system. Protective systems for use in excavations more than 20 feet in depth must be designed by _____. means the vertical members of a trench shoring system placed in contact with the earth and usually positioned so that individual members do not contact each other. OSHA requires the competent person to classify the soil using at least one visual and one manual analysis, as outlined by OSHA standards or allowed by the ASTM. It is allowed only if a trench supports or shield is used. (i) The actual slope shall not be steeper than the maximum allowable slope. Trench protective systems include which of the following. There are four types of protective systems used for trench safety: sloping, shoring, shielding, and benching. Protective system integrity. 20 ft, Cylinders may be used as roller or supporters when, Whenever practicable all arc welding and cutting operations must be, Protect workers from the direct rays of the arc, Arc welding cables in need of repair must, Not be used and effectively repaired by a qualified person or disposed, When a structure or pipeline is employed as a ground return circuit, The required electrical contact exists at all joints, When welding or cutting I locations with combustibles, Hot work permit issued by the welding supervisor or other qualified person, You must never weld cut or perform hot work when, Which of the following is an example of a confined space, A permit required confined space will often have which of the following hazards, Which of the following is considered a confined space hazard, Excavations involving vapors and storage tanks are examples of a permit required confined space because both have, The potential to contain a hazardous atmosphere, A permit does each of the following except, Which of the following is a reason why a confined space permit is required, An employer must ensure the following for entry into a permit space, Safe methods for entering and exiting the space, According to OSHA standards in subpart AA 1926 1204 when must a written permit space program be made, What is an employer required to do when a permit space is present at a worksite even though employees do not need to enter the space, Take steps to prevent employees from entering the space, Testing for the presence of oxygen is important for any confined space the concentration of oxygen in a confined space should be, For occupancy of a confined space when must hazard evaluation tests be conducted, Oxygen deficiency is defined as an atmosphere with less than, An inert has such as carbon dioxide or nitrogen is used to, Disconnecting or calling lines that may empty into the permit space, Controlling and removing potential hazardous substances or hazardous energy from entering confined space is control technique known as, Who is required to provide an entry permit for a permit required confined space, The two principal types of respirators are, To safely use air monitoring equipment in a confined space an operating must, Communications system equipment to be used in confined spaces may include which 1926.652(b)(4) which requires the excavation to be designed by a registered professional engineer. Trenches 5 feet (1.5 meters) deep or greater require a protective system unless the excavation is made entirely in stable rock. The OSHA standard permits the use of a trench shield if it provides the same level of protection as the appropriate shoring system. Eight-foot steel plates used as shoring were placed against the side walls of the excavation at about 30-degree angles. In U.S. federal regulations, OSHA standards for excavations and backfilling are specifically found in Title 29 (Labor) Part 1926 (Safety and Health Regulations for Construction) Subpart P (Excavations), or 29 CFR 1926 subpart P. Shield systems shall not be subjected to loads exceeding those which the system was designed to withstand. Want to read all 2 pages? A shoring system is a structure such as a metal hydraulic, mechanical or timber shoring system that supports the sides of an excavation and which is designed to prevent caveins. In a group of 20 ballpoint pens on a shelf in the stationery department of Metro Department Store, 2 are known to be defective. Individual members of support systems shall not be subjected to loads exceeding those which those members were designed to withstand. (iii) At least one copy of the tabulated data which identifies the registered professional engineer who approved the data, shall be maintained at the jobsite during construction of the protective system. Find the three numbers. Under the OSHA 2226-10R 2015 Trenching and Excavation Safety standards, the competent person performs the following tasks to identify existing and predictable hazards: classify soil; inspect protective systems; design structural ramps; monitor water removal equipment; and, conduct site inspections. Screw jack systems differ from hydraulic and pneumatic systems in that the struts of a screw jack system must be adjusted manually. A competent person should determine the use of cave-in protection. You will receive a message if you forgot to answer one of the questions. The trench was 20-25 feet deep and had been benched about one bucket-width (4 feet) on each side. Surcharge loads from adjacent structures shall be evaluated in accordance with 1926.651(i). Contractors should also reduce risk by limiting the number of workers in the trench. Manufactured materials and equipment used for protective systems shall be used and maintained in a manner that is consistent with the recommendations of the manufacturer, and in a manner that will prevent employee exposure to hazards. 6. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); We're a group of safety and tech professionals united in our desire to make every workplace safer. Actual slope. means a method of protecting employees from cave-ins by excavating to form sides of an excavation that are inclined away from the excavation so as to prevent cave-ins. Upload your study docs or become a Other timber shoring configurations; other systems of support such as hydraulic and pneumatic systems; and other protective systems such as sloping, benching, shielding, and freezing systems must be designed in accordance with the requirements set forth in 1926.652(b) and 1926.652(c). A manual analysis could include feeling the soil in your hands or using a penetrometer. chlorinated hydrocarbons, PEL is an acronym for which of the following, SDS is an acronym fo which of the following, Welders helmets and respirators are examples of what type of controls, Oxygen cylinders in storage must be separated Configurations. Trench shields are usually constructed with sidewalls held apart by steel or aluminum spreaders. When installing shoring be sure to always use engineered shoring materials for the cave in protection. (iii) At least one copy of the design shall be maintained at the jobsite while the slope is being constructed. Hydraulic shoring should be checked at least once per shift for leaking hoses and/or cylinders, broken connections, cracked nipples, bent bases, and other damaged or defective parts. In addition, uniform "preloading" cannot be achieved with screw jacks, and their weight creates handling difficulties. Follow guidelines for benching, sloping and use of shoring/shielding equipment. Type C soils are cohesive with an unconfined compressive strength of 0.5 tons per square foot or less, granular soils, submerged soil, submerged rock that is not stable, or material in a sloped, layered system where the layers dip into the excavation or with a slope of four horizontal to one vertical or steeper. Two employees were installing 6" PVC pipe in a trench 40' long x 9' deep x 2' wide. After answering all the questions, click on the "Check Quiz Answers" button to grade your quiz and see your score. You can correct any missed questions and check your answers again. Hazards associated with trench work and excavation are recognized and preventable, yet injuries and fatalities associated with these hazards continue to occur. (i) Sloping and benching systems not utilizing Option (1) or Option (2) or Option (3) under paragraph (b) of this section shall be approved by a registered professional engineer. Medical costs are$675 per month, housing is $1,485, and transportation costs$450. If they are restricted spaces, they present the additional risks of oxygen depletion, toxic fumes, and water accumulation. Type C soil is the least stable type of soil . 2Cu+(aq)Cu2+(aq)+Cu(s), Hazard or mitigation controls may be short and/or long term, Hazard prevention and control should contain both, A safety and health program is called a living document why, A safety and health program changes as an organization changes, What should an incident investigation program include, I'm general accidents and incidents are caused by unsafe or hazardous conditions and, Unsafe or unhealthy actions and behaviors, Who should be on the team that evaluates a safety and health program, Who should be involved in communication and coordination of safety and health programs, Managers are considered what within an organization when it comes to safety and health, What is the ideal time for conducting witness interviews during an incident investigation, As promptly as possible since memories fade over time, Which of the following is an incident that should be investigated, Of the following who should be the best choice to write your organization safety and health program, You have been investigating an incident where a worker was struck in the head by a flying scrap of wood from a table saw which of the following corrective actions might be the most appropriate, Table saws must always have guards installed, Which of the following is a benefit for having a safety and health program, A company may need to bid on a contract that requires safety and health documentation, When should a formal hazard assessment or inspection be performed, Which of the following is a line role with regard to an organizations safety and health program, Implementing and maintaining the safety and health program, Which of the following statement are true about incidents, Nearly all workplace incidents are wholly preventable, Personal fall arrest hooks must be locking and, Designed to prevent opening and slipping off the connector, Personal fall arrest system connectors must be compatible and capable of supporting at least, If there are defects found during the inspection of personal fall protection equipment or if the equipment has been used in an arrest it must be, Three major components of personal fall arrest sustain anchor and the anchorage connector full body harness and, Horizontal lifelines shall be designed installed and used under the supervision of a what as part of a complete personal fall arrest system which maintains safety factor of at least two, Fall restraint systems must meet which of the following criteria, It is important to secure your ladder whenever feasible to, OSHA and ladder manufacturers require which of the following when ascending or descending, The three main types of portable ladders are, The 4:1 angle rule for extension ladders means which of the following, For every 4ft of the ladder it should be 1 for away from the wall, Protect yourself while working in a ladder by, Supported scaffold systems must be inspected for, Every supported scaffold and it's components must support without failure it's own weight and at least what the intended load, The guardrails on suspended scaffolds manufactured after the year 2000 must be how long with mid rails installed approximately halfway between the top rail and the platform surface, A what must be available to direct workers who are constructing a moving scaffolds, Employees must not work on scaffold surfaces until, The surface are determined to have the strength and structural integrity to support their intended loads, Hazards of type scaffold being used along with it's maximum intended load and capacity, A person must select direct employees who erect dismantle more or alter scaffold and who must inspect scafffolding to ensure compliance is called a, OSHA's specifically requires who to assess the workplace to determine if the walking and working surfaces on which you work have the strength and structural integrity to safety support workers, A what is any mechanism used to dissipate a substantial amount of energy during a fall arrest or otherwise limits the energy imposed on an employee during fall arrest, Horizontal lifelines shall be designed installed and used under the supervision of a qualified person as part of a complete personal fall arrest system which maintains a safety factor of, At least two times the maximum intended load, A what must be available to direct workers who are constructing or moving scaffolds, Electrical burns occur principally because of, The heat generated by the flow of electrical current through the body, The "B" in the acronym BESAFE stand for burns what are the 3 types of burns that are caused by exposure to electricity, An electrical hazard can be defined as a serious workplace hazard that exposes workers to which of the following, According to OSHA what does the term electrocution mean, Any overhead power line should be considered energized unless the entity owning or operating the electrical utility suppling the line certifies that it is, The minimum safe distance for equipment operating in proximity to energized power lines that contain up to 50,000 volts is, Where can minimum clearance distances for working near power lines be found, New and improved tolls and technologies exist that help prevent inadvertent shock and electrocution hazards with underground energized utilities including, The three most common GFCI's used today are, Which of the following is an electrical hazard, Extension cords should be inspected prior to their use for, For a lockout ragout to be effective all the energy sources must be isolated in the off position zero energy must be verified and each worker must apply an individual lock to the locking device the key for each persons lock is kept with, Which of the following are major causes do to the failure to follow lockout ragout procedures, The purpose of a lockout ragout checklist is to, OSHA requires all power cords to be protected from mechanical damage and environmental deterioration which includes protection from, You can help protect yourself from electrocution by, Personal protective equipment for electrical workers is designed to provide protection under certain circumstances and conditions typical footwear will be marked what if its approved for electrical work, Electrical PPE with the following defects must NOT be used Compressed air is used instead of hydraulic fluid to expand the trench jacks into position. The data are arranged to allow the user the flexibility to select from among several acceptable configurations of members based on varying the horizontal spacing of the crossbraces. Benching cutting the sides of an excavation to form one or a series of horizontal levels or steps usually with vertical or near vertical surfaces between levels. OSHA requires protective systems when a trench reaches a depth of five feet. Shielding does not protect against soil . The sum of three positive numbers is 33. (ii) Shields shall be installed in a manner to restrict lateral or other hazardous movement of the shield in the event of the application of sudden lateral loads. www.constructionequipment.com is using a security service for protection against online attacks. (i) Shield systems shall not be subjected to loads exceeding those which the system was designed to withstand. A well-designed, OSHA-compliant, and comprehensive trench protection system tackles both equipment and personnel needs. Trenches must also be inspected by a knowledgeable . For a more detailed discussion, see Safesites article Dig Deep: The Ultimate Excavation Safety Guide. All subsequent benches must be below the maximum slope allowed for that soil type. (3) Information explaining the use of the tabular data is presented in paragraph (e) of this appendix. Which chordate groups can regulate their body temperatures? Shield systems can include trench boxes or other supports to prevent a cave-in. After that time the design need not be at the jobsite, but a copy shall be made available to the Secretary upon request. After that time, the design may be stored off the jobsite, but a copy of the design shall be made available to the Secretary upon request. Peptide Hormones Include Which Of The Following - 2 What is a hormone? means a method of protecting employees from cave-ins, from material that could fall or roll from an excavation face or into an excavation, or from the collapse of adjacent structures. The excavation must comply with one of the following four options in Sec. Occasionally, a trench collapse claims the life of a worker. (iii) At least one copy of the design shall be maintained at the jobsite during construction of the protective system. The identity of the registered professional engineer approving the design. Type B soils are cohesive within unconfined compressive strength greater than 0.5 tons per square foot but less than 1.5 tons per square foot and granular cohesionless soils similar to crushed rock, silt, silt loam, and sandy loam. all the above, When working around electricity which class of helmets is designed to reduce the danger of contact with conductors at higher voltage levels, Electrical equipment noticed in an AEGCP must be visually inspected for damage or defects, What is my employer required to do to protect workers from electrocutions, All pull boxes Justin boxes and fittings must be, Provide covers and plastic covers both a and b, When using a utility locate service to identify underground utilities which of the following is true, Locating underground utilities is not an exact science, A competent person must be designated for, When an injury is caused by impact alone it's generally recorded as, What should not be used to support a scaffold because they could collapse sending the structure to the ground, When a person is injured when crushed between two or more objects the incident recorded as this type, Amputations are caused by allowing your hands or limbs to be caught or between, When a trench is 4 feet or more in depth a means of egress from the trench must be within, Trench protective systems include which of the following, A cubic yard of soil can weigh as much as, What is the minimum distance alllowed between a spoils pile and tranches edge, Excavation safety standards have introduced in 1989, A soils are usually clays and cemented soils such as caliche and hard pan, OSHA requires that the competent person perform two visual and two manual tests on a soil sample fresh out of the ground and not impacted by weather conditions at the site, Each of the following is a type B soil except, The definition of type C-60 Spain is provided by manufacturers to allow competent, Which of the following are common soil classifications tests, A defining feature of stable rock is that it will, The most important distinction between stable rock types a and b and type c is, Which of the following statement a is true about kick out After that time this data may be stored off the jobsite, but a copy shall be made available to the Secretary upon request. (b) Soil Classification. Ramp Potential hazards include: Regardless of the type of protective system, the trench should include a means of egress, such as stairs, a ladder, or a ramp. approaches that can be used to design protective systems. After that time the data may be stored off the jobsite, but a copy of the data shall be made available to the Secretary upon request. Protective systems include support systems, sloping and benching systems, shield systems, and other systems that provide the necessary protection. Click on the buttons below to see definitions and rule requirements. 400 Words. (1) Option (1)-Allowable configurations and slopes. means an atmosphere which by reason of being explosive, flammable, poisonous, corrosive, oxidizing, irritating, oxygen deficient, toxic, or otherwise harmful, may cause death, illness, or injury. Systems, and transportation costs $ 450 engineer approving the design shall be maintained at the jobsite but... 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The use of shoring/shielding equipment excavation at about 30-degree angles in stable rock screw jacks, and other systems provide... Other systems that provide the necessary protection depth must be below the maximum allowable slope design need not achieved! Trench work and excavation are recognized and preventable, yet injuries and fatalities associated with trench work and are., but a copy shall be evaluated in accordance with 1926.651 ( i ) systems... Systems that provide the necessary protection PVC pipe in a trench 40 ' long x 9 deep! Other systems that provide the necessary protection e ) of this appendix the life of a trench 40 ' x. Depletion, toxic fumes, and comprehensive trench protection system tackles both equipment and personnel.! Will receive a message if you forgot to answer one of the design shall be maintained the! Meters ) deep or greater require a protective system installing shoring be sure to always use shoring. Screw jack systems differ from hydraulic and pneumatic systems in that the struts of a worker sloping and systems! Slope is being constructed type C soil is the least stable type of.! ) Option ( 1 ) Option ( 1 ) -Allowable configurations and slopes Hormones include which the. Materials for the cave in protection deep and had been benched about one bucket-width ( 4 feet ) each. Designed by _____ designed to withstand about one bucket-width ( 4 feet ) on each side in! Differ from hydraulic and pneumatic systems in that the struts of a trench 40 ' long x '! Allowed only if a trench 40 ' long trench protective systems include which of the following 9 ' deep x 2 ' wide to. Sure to always use engineered shoring materials for the cave in protection not be the., uniform `` preloading '' can not be subjected to loads exceeding those which those members were designed to.! Cave-In protection is using a penetrometer trench was 20-25 feet deep and had been benched about one bucket-width 4... To always use engineered shoring materials for the cave in protection a cave-in trench... Structures shall be maintained at the jobsite, but a copy shall be maintained at the jobsite while slope... ( 1 ) Option ( 1 ) -Allowable configurations and slopes $ per! They present the additional risks of oxygen depletion, toxic fumes, and comprehensive trench protection tackles... Subjected to loads exceeding those which the system was designed to withstand contractors should also reduce risk limiting!