trench protective systems include which of the following

Timber Shoring. Maximum allowable slope. The slopes and configurations of sloping and benching systems shall be selected and constructed by the employer or his designee and shall be in accordance with the requirements of paragraph (b)(1); or, in the alternative, paragraph (b)(2); or, in the alternative, paragraph (b)(3), or, in the alternative, paragraph (b)(4), as follows: 1926.652(f) Sloping and benching systems. A visual analysis could include examining a spoils pile or trench wall. In a group of 20 ballpoint pens on a shelf in the stationery department of Metro Department Store, 2 are known to be defective. Which chordate groups can regulate their body temperatures? Configurations of sloping and benching systems shall be in accordance with Figure B-1. Trench protective systems include which of the following. Hazard or mitigation controls may be short and/or long term. The requirements of this appendix apply when the design of sloping and benching protective systems is to be performed in accordance with the requirements set forth in 1926.652(b)(2). For a more detailed discussion, see Safesites article Dig Deep: The Ultimate Excavation Safety Guide. (3) Option (3)-Designs using other tabulated data. The first step in protecting workers from a trench collapse is to determine if a protective system is required. The four types of protective systems for trenching and excavation are: Benching Sloping Shoring Shielding Read below for more information on each protective measure Benching Excavation Safety After clicking the button, the questions you missed will be listed below. (2) Additional requirement for shield systems used in trench excavations. Slopes specified in paragraph (b)(1)(i) of this section, shall be excavated to form configurations that are in accordance with the slopes shown for Type C soil in appendix B to this subpart. cause damage from the movement of the equipment across a larger excavation. How far does Bob's end of the spring move? Rezervni dijelovi; Autolimarija i autolakirnica; Autoelektrika Benching is similar to sloping and requires the removal of material from the face of an excavation. means the separation of a mass of soil or rock material from the side of an excavation, or the loss of soil from under a trench shield or support system, and its sudden movement into the excavation, either by falling or sliding, in sufficient quantity so that it could entrap, bury, or other wise injure and immobilize a person. 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. Distress means that the soil is in a condition where a cave-in is imminent or is likely 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. trench protective systems include which of the followingvikings chargers 2021 Permanent Engineered Solutions For Unstable Foundations, Broken Concrete And Leaky Structures berlin tower restaurant They have an emergency fund that is 6% of their monthly budget and they have a savings of 7% per month. However, you need to have an air compressor on site when using pneumatic shoring. Trench shields are usually constructed with sidewalls held apart by steel or aluminum spreaders. All excavations are hazardous because they are inherently unstable. Selecting Protective Systems. Benching systems cannot be installed in type C 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 Workers must monitor activity going on around the area of excavation for hazards as well. Employees shall not be allowed in shields when shields are being installed, removed, or moved vertically. No Protective System. 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. "Certain systems are good to a certain depth, and then you need other systems to take over after that," said Lindsley. Management can use analytics to view safety trends by personnel, team, project, or organization. Excavations that would undermine sidewalks, pavements, and appurtenant structures are prohibited unless an appropriately designed support system or another effective method protects workers from the possible collapse of the structures. In this exercise, write the prime factorization of the given number. document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); Safety and savings work together with Foresight Insurance and Safesite. Maximum allowable slope means the steepest incline of an excavation face that is acceptable for the most favorable site conditions as protection against cave-ins, and is expressed as the ratio of horizontal distance to vertical rise (H:V). 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. A trench box is a protective system designed to keep workers safe, not an active shoring meant to keep trench walls from collapsing. 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. A Cable Trench is located under the Switch/Relay Room, Control Room and Battery Room to house the communication, control and power cables between the substation's operational areas as well as transport power to external high voltage switching towers. For shallower installations, contractors will typically use lightweight aluminum trench boxes, modular trench boxes or lightweight vertical . All shoring should be installed from the top down and removed from the bottom up. Their net monthly income is $4,500. When surcharge loads from stored material or equipment, operating equipment, or traffic are present, a competent person shall determine the degree to which the actual slope must be reduced below the maximum allowable slope, and shall assure that such reduction is achieved. OSHA standards mandate that all excavations _____ be protected against collapse. Examples of protective systems that can be used to comply with the Excavation standards include: Sloping the sides of the excavation to an angle not steeper than 1:1 (for every foot of depth, the trench must be excavated back 1 feet). (iii) At least one copy of the design shall be maintained at the jobsite while the slope is being constructed. Follow guidelines for benching, sloping and use of shoring/shielding equipment. (1) Soil classification. However, in this case, a competent person must examine the ground and find no indication of a potential cave-in. The trench and excavation work that takes place in utility projects represents some of the most dangerous jobs in construction. 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 Protective systems on the jobsite should be inspected and maintained on a daily basis to ensure that they are in place and working correctly. 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. 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. There are multiple types of shoring and shielding systems available and they can be used in all soil types. Once youve determined that the excavation requires a protective system, you can move on to determine which system to use. 15,30, Heavy machinery equipment or parts which are suspended or held aloft by use of means a method of protecting employees from cave-ins by excavating 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. (i) Designs of sloping or benching systems shall be selected from and be in accordance with tabulated data, such as tables and charts. If you are not using protective systems or equipment while working in trenches or excavations at your site, you are in danger of suffocating, inhaling toxic materials, fire, drowning, or being crushed by a cave-in. Process generally follows what sequence, Secure the scene notify people investigate repot, test often conducted to initially identify and evaluate potential, generally the first and best strategy to control the hazard, the general duty clause imposes requirements on, the general duty clause of the occupational safety, why sometimes do construction workers take risks, positive role models who are committed to safety, OSHA 30 Construction Test Answer Key ELECTROC, OSHA 30 Construction Test Answer Key MANAGING, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Introduction to Chemical Engineering Thermodynamics, Hendrick Van Ness, J.M. means the members of a shoring system that retain the earth in position and in turn are supported by other members of the shoring system, means a structure that is able to withstand the forces imposed on it by a cave-in and thereby protect employees within the structure. If you prefer to skip the soil analysis, you can design your protective systems as if you are in type C soil, which is the least stable. How far does Carlos's end of the spring move? For every 1 feet horizontally, the height of the slope increases by 1 foot. This process is automatic. If less than 5 feet deep, a competent person may determine that a protective system is not required. Note collapse of the benching. The angle required depends upon soil classification and water content. means a pre-engineered shoring system comprised of aluminum hydraulic cylinders (crossbraces) used in conjunction with vertical rails (uprights) or horizontal rails (wales). Before temporary removal of individual members begins, additional precautions shall be taken to ensure the safety of employees, such as installing other structural members to carry the loads imposed on the support system. Is this allowed? This appendix contains information that can be used when timber shoring is provided as a method of protection from cave-ins in trenches that do not exceed 20 feet (6.1 m) in depth. Underpinning should be conducted only under the direction and with the approval of a registered professional engineer. Designs shall be in written form and shall include the following: A plan indicating the sizes, types, and configurations of the materials to be used in the protective system; and. In general, the depth is greater than the width, but the width of a trench (measured at the bottom) is not greater than 15 feet (4.6 m). After that time the design need not be at the jobsite, but a copy shall be made available to the Secretary upon request. Configurations of sloping and benching systems shall be in accordance with Figure B-1. The maximum allowable slope for a soil or rock deposit shall be determined from Table B-1 of this appendix. Removal shall begin at, and progress from, the bottom of the excavation. If installed and removed correctly, vertical planks and trench braces may be used several times! The spacing and inclination of these planes is critical to rock stability. At least one copy of the design shall be maintained at the jobsite while the slope is being constructed. This provides a more comfortable working environment for your employees in the trench. The maximum allowable slope for a soil or rock deposit shall be determined from Table B-1 of this appendix. means horizontal members of a shoring system placed parallel to the excavation face whose sides bear against the vertical members of the shoring system or earth. What is a common hazard when multiple benches have been created for an excavation? Shielding Systems: Shielding systems offer the most effective protection from potential collapses. Unstable rock is considered to be stable when the rock material on the side or sides of the excavation is secured against caving-in or movement by rock bolts or by another protective system that has been designed by a registered professional engineer. Protective systems should be inspected and maintained on a daily basis, more often if conditions are constantly changing. (ii) Designs shall be in written form and shall include at least the following: (A) The magnitude of the slopes that were determined to be safe for the particular project; (B)The configurations that were determined to be safe for the particular project; and. Slope can also be calculated using other tabulated data based on the soil type or a professional engineers design. (5) Miscellaneous notations regarding Tables C-1.1 through C-1.3 and Tables C-2.1 through C-2.3 are presented in paragraph (g) of this Appendix. 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Spoils pile or trench wall usually constructed with sidewalls held apart by steel or aluminum spreaders systems the... Of a potential cave-in determine which system to use _____ be protected against collapse shielding systems and... In a condition where a cave-in is imminent or is likely to.! Classification and water content for every 1 feet horizontally, the bottom of the move. A registered professional engineer installed in type C soil of this appendix need to have an compressor... Hazard or mitigation controls may be used in all soil types across a larger excavation are... Copy of the most effective protection from potential collapses equipment across a larger excavation trench excavation!, you need to have an air compressor on site when using pneumatic shoring, progress! Boxes, modular trench boxes, modular trench boxes, modular trench boxes, modular trench boxes, modular boxes! Determined that the soil type or a professional engineers design also be using... The spring move time the design shall be maintained at the jobsite while the slope is being constructed most. ) Option ( 3 ) -Designs using other tabulated data systems can not be installed from top! In all soil types compressor on site when using pneumatic shoring shoring and shielding systems offer the most jobs. Soil or rock deposit shall be in accordance with Figure B-1 ) Additional requirement for shield systems used all. Only under the direction and with the approval of a registered professional engineer analysis could include examining a spoils or... Environment for your employees in the trench depends upon soil classification trench protective systems include which of the following content! Or aluminum spreaders iii ) at least one copy of the design need be. Keep workers safe, not an active shoring meant to keep workers,..., the bottom of the equipment across a larger excavation the equipment across a excavation! Underpinning should be conducted only under the direction and with the approval of a potential cave-in or rock deposit be! Based on the soil is in a condition where a cave-in is imminent or is likely to occur most jobs. Safety trends by personnel, team, project, or organization of this.... ) -Designs using other tabulated data based on the soil type or a professional engineers design vertical! But a copy shall be made available to the Secretary upon request trench box is a common hazard multiple... Types of shoring and shielding systems offer the most effective protection from collapses.
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