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The two-person double chair, which for many years was the workhorse of the ski industry, can move roughly 1,200 people per hour at rope speeds of up to 2.5 m/s (8.2 ft/s). [2] The four person detachable chairlift ("high-speed quad") can transport 2,400 people per hour with an average rope speed of 5 m/s (16.4 ft/s). [ 3 ]
A two-pinned lewis consists of two pins, linked by a short chain. The pins are inserted into opposing holes that are drilled into the top of the stone at about 15° from vertical. It operates by gripping the stone (like two fingers lifting a tenpin bowling ball) as the weight of the stone is taken up by a crane or winch.
The regulations stated that all lifts provided for use with work activities should be thoroughly examined by a 'competent person' at regular intervals. [6] Regulation 9 of the Lifting Operations and Lifting Equipment Regulations requires all employers to have their equipment thoroughly examined prior to it being put into service and after there ...
Lifting equipment, also known as lifting gear, is a general term for any equipment that can be used to lift and lower loads. [1] Types of lifting equipment include heavy machinery such as the patient lift , overhead cranes , forklifts , jacks , building cradles, and passenger lifts, and can also include smaller accessories such as chains ...
Two people lifting or carrying the load not only distributes the weight evenly but also utilizes their natural lifting capacity, reducing the chances of strains or sprains. Proper communication between partners is necessary for coordination during the lift, ensuring the safety of both the participants, the goods being carried, and the ...
In a simpler construction, a shearleg derrick can be assembled from two posts to form A-frame shear legs without any crossbar. The bottom of the legs are set in two holes on the ground, spreading them apart. There is a rope to tie the two legs together near the bottom to prevent them from spreading apart further.
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In construction, commissioning or commissioning process (often abbreviated Cx) [1] [2] [3] is an integrated, systematic process to ensure, that all building systems perform interactively according to the "Design Intent", through documented verification. The commissioning process establishes and documents the "Owner's Project Requirements (OPR ...