Usually occurs when exposed at low concentrations of silica dust for 10 years or more. Cranes and Derricks Safety I This course is intended to help businesses comply with OSHA's standard 29 CFR 1926 Subpart CC, Cranes & Derricks in Construction. A qualified person must determine if the repair/adjustment meets manufacturer equipment criteria (where applicable and available). If a mobile scaffold is to be moved, if the ground is not within _____ degrees of level, it must be disassembled before moving. Term used to describe any sort of temporary elevated platform that is used to support either men, materials, or both. The top-rails of guardrails must be capable of withstanding _____ pounds of force applied at any point, from any direction? Read each question carefully. Welcome to Crane Types and Components. For tower cranes, the following additional items must be inspected (Standard 1435(f)(4)): tower (mast) bolts and other structural bolts (for loose or dislodged condition) from the base of the tower crane up or, if the crane is tied to or braced by the structure, those above the uppermost brace support; and Employers must provide a stairway or a ladder at points of access where the elevation between two steps is. The inspection must determine if the repair/adjustment meets the criteria developed by the RPE or qualified person and must include functional testing. Warning lines must be rigged and supported so that the lowest point is never less than ___ inches from the walking/working surface. The monthly inspection is the same as a shift inspection for most equipment. Digger derricks used in construction work for telecom- ... materials from the truck crane to the ground, with-out arranging the materials in a particular sequence for hoisting. Class E (Electrical) protects against falling objects and high-voltage electric ___ Volts shock and burns. The standard does not specify where a competent person must do the annual inspection on the crane. What option do employers have when conventional fall protection systems are not feasible and might even put workers at risk? b. There are four basic methods of controlling breathing hazards. If a qualified person determines, even though not presently a safety hazard, the deficiency needs to be monitored, the employer must ensure the deficiency is checked in the monthly inspections. For all other lifeline applications, a minimum of ____-inch manila or equivalent, with a minimum breaking strength of 5,400 pounds, shall be used. Derrick Equipment Zone 1 (A-Frame / Crown / Water Table) ... must . When does electricity become hazardous to humans? Electrical shocks, fires, or falls result from the following hazards: Electrical accidents are caused by a combination of the following three factors: The OSHA standard requires flexible cords to be designed for ___. This system should be attached to a D ring between the shoulder blades above the employee. b. be taken out of service until the deficiency is corrected Where these instructions are unavailable, the test must be conducted in accord with The line in a personal fall arrest system should be rigged so that a worker does not free fall for more than _____ feet. Circular saws, chainsaws, and percussion tools must be equipped with a ___ ___ switch that will shut off when the pressure is released. The platform in a two-point scaffold should be no more than ___ inches wide. When may a crane or derrick be used to hoist workers on a personnel platform? To prevent jamming, the distance between the work rest and grinder wheel should not exceed _____. They are easy to build, economical, and practical. A multi-level scaffold is a series of platforms that are arranged vertically, one on top of the other. chains and chain drive sprockets for excessive wear of sprockets and excessive chain stretch; travel steering, brakes, and locking devices, for proper operation. Unit proof load tests must be carried out by the use of weights as a dead load. Each shift, a competent Person must visually inspect the crane. Safety belt lanyard shall be a minimum of ___-inch nylon, or equivalent, with a maximum length to provide for a fall of no greater than 6 feet. for derricks, gudgeon pins for cracks, wear, and distortion, and foundation supports for continued ability to sustain the imposed loads. ... An examination must be carried out in conjunction with each unit proof load test and annually thereafter. Safety nets must never be installed more than ___ feet under walking/working surfaces. Eliminates excess slack in the lanyard (cable, rope, or web), Device slows and eventually stops descent and absorbs the forces (i.e., rip stitch controlled tearing). He was wearing non conductive safety shoes. Your crane’s owner’s manual will list these requirements, so make sure you keep a copy handy for reference. In general, a qualified crane operator who has the authority to take corrective measures will be a competent person. Tower crane components must be inspected by a qualified person before being erected. In addition to the other requirements listed above for post-assembly inspections, the following requirements must be met: Where the severity of use/conditions is such that there is a reasonable probability of damage or excessive wear (such as loading that may exceed rated capacity, shock loading exceeding the What is the best method for inspecting abrasive wheels for cracks? In relation to a substantial alteration, modification or repair of a derrick crane, it includes the boom, These are scaffolds that consist of one or more platforms elevated on poles and beams which are placed upon a solid ground. (1) - The multiple-crane/derrick lift must be directed by a person who meets the criteria for both a competent person and a qualified person, or by a competent person who is assisted by one or more qualified persons (lift director). An inspection of the functions and correct settings can only be carried out after the electrical erection of the crane and following installation of the luffing rope and hoist rope. Gantry and travelling cranes together with their trolleys, where appropriate, are to be traversed and travelled over the full length of their track. The manufacturer of your overhead crane may require additional inspections at various intervals. Generally, the crane is characterized by its long, fixed length tower. A crane or derrick inspection must be carried out: Once a week a month all of the above The minimum clearance between a crane and any power line rated at 50 kV or below must be 10 feet. The mid-rails of guardrails must be capable of withstanding how many pounds of force applied at any point, in any direction. ___ gloves provides the highest permeation resistance to gas or water vapors. Which type of lanyards absorbs the least amount of force? the annual inspection must include: If a qualified person who conducts an inspection identifies any deficiency in any of the items inspected and determines the deficiency constitutes a safety hazard, the equipment must be

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