ASTM_F_2153_-_07_2012.pdf

Designation:F215307(Reapproved 2012)An American National StandardStandard Test Method forMeasurement of Backpack Capacity1This standard is issued under the fixed designation F2153;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method determines and standardizes an unex-tended and extended capacity for backpacks and related bags.Related bags include lumbar packs,soft rucksacks,internal andexternal frame packs,duffel bags,and travel packs.1.2 This test method is designed to provide a meanswhereby manufacturers and consumers may have a consistentmeans to compare pack volumes.1.3 This test method does not take into consideration areasof the backpack that are not completely enclosed by fabric suchas mesh pockets,water bottle holders,and compressor pockets.1.4 For practical purposes this test method cannot be used tomeasure capacities less than 4 L.1.5 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Terminology2.1 Definitions:2.1.1 backpack,nany carrying device constructed of fab-ric that utilizes a single or double shoulder strap as the meansfor the wearer to carry the bag on the users back.2.1.2 backpack back,npart of the backpack that is againstthe users back.2.1.3 backpack front,npart of the backpack that is awayfrom the users back.2.1.4 extended capacity,nmaximum achievable volumeof a backpack including all compartments and extensionsmaximized to their largest usable volume.2.1.4.1 full for panel loaded:Zipped shut and all expansionpanels open.When placed on a person the pack looks usableand the top pocket appears level or in alignment with rest of thepack style(that is,not tipped forward or back excessively).2.1.4.2 full for top loader:12 in.2maximum opening ofextension collar draw cord,with pack body draw cord com-pletely open.When placed on a person the pack looks usableand the top pocket appears level or in alignment with rest of thepack style(that is,not tipped forward or back excessively).2.1.4.3 roll top:In accordance with the manufacturersdesign with all extension panels open.2.1.5 extension skirt,nfabric extension which is attachedto the top of the pack body and extends over and above theactual pack body.2.1.6 external frame pack,nbackpack that uses a rigid orsemirigid frame on the outside of the pack bag.2.1.7 frame sheet,nsheet generally constructed of foam orpolyethylene,which forms the support in the back of thebackpack.2.1.8 internal frame pack,nbackpack that uses one ormore supports,or stays,made from a rigid or semirigidmaterial,and incorporated into the inside of the backpack(usually made of aluminum,graphite,or carbon-fiber).2.1.9 lumbar pack,nbackpack that is designed to fit in thesmall of the back.Many lumbar packs do not have shoulderstraps.2.1.10 soft rucksack,nbackpack that does not have a rigidframe and is generally of smaller size.This backpack may havea back constructed of foam,or a light frame sheet.2.1.11 unextended backpack capacity,nmaximum achiev-able volume of a backpack including all compartments maxi-mized to their largest usable volume.All extensions closed.2.1.11.1 full for panel loaded:Zipped shut.When placed ona person the pack looks usable and the top pocket appears levelor in alignment with rest of the pack style(that is,not tippedforward or back excessively).2.1.11.2 full for top loader:12 in.2maximum opening ofpack body draw cord.When placed on a person the pack looksusable and the top pocket appears level or in alignment withrest of the pack style(that is,not tipped forward or backexcessively).2.1.11.3 roll top:In accordance with the manufacturersdesign.3.Summary of Test Method3.1 Determining Backpack CapacityAll compartments(including main pack body,top pocket,exterior pockets)are1This test method is under the jurisdiction of ASTM Committee F08 on SportsEquipment,Playing Surfaces,and Facilitiesand is the direct responsibility ofSubcommittee F08.22 on Camping Softgoods.Current edition approved May 1,2012.Published August 2012.Originallyapproved in 2001.Last previous edition approved in 2007 as F2153 07.DOI:10.1520/F2153-07R12.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 filled with 20-mm plastic balls to their extended capacity.Ballsare removed to bring the pack down to its unextended capacity.The removed balls are temporarily stored.The rest of the packis emptied and the capacity measured in the graduated cylinderas the unextended capacity.The balls removed in the first stepare then added to the cylinder to meas