ASTM F2821-15 (2020) pdf free

04-13-2021 comment

ASTM F2821-15 (2020) pdf free.Standard Test Methods forBasket Type Rescue Litters.
Attach test apparatus to the head end of the litter atpoints designated by the litter manufacturer. If the litter isequipped with designated connection points then those connection points shall be used.If the manufacturer suggests that thelitter be attached with a system using rope or webbing wrappedaround the frame rails,then those instructions shall be followed.
The bridle shall be constructed of chain or 9.5 mm (3/ sin.) cable. If using cable, the individually terminated bridle legsshall be proof loaded to a force of 1.5 kN (350 1bf) pre-litter test to eliminate stretching or the potential for any slippageduring the litter test. If rope or webbing is used it shall be ofsufficient strength to minimize elongation and to insure that the litter is tested and not the attachment method or material.8.3The internal angle of the bridle shall be as small as possible.If manufactured connections on the litter are in sucha location that the bridle contacts the shell of the litter,the bridle shall be extended just enough to eliminate contact withthe litter shell.
Secure the litter to the bed of the test machine using ananchor plate of approximately 40 by 40 cm (16 by 16 in.)inside the litter. The plate shall be centered between the rails(or ribs) at the end of the litter opposite of the bridle. The plateshall span any rails or cross rails to distribute the load on thelitter frame or shell. In cases where the litter does not have aframe,or if the specified plate size does not span the framerails,the size can be increased to span structural elements inthe shell or the frame. In the event that the plate comes intocontact with the side elements,the plate may be narrowedaccordingly to eliminate interference.
This standard does not purport to address all of thesafety concerns,if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health,and environmental practices and determine the applicability of regulatory limitations prior to use.This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.ASTM F2821 pdf download.

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