ASME B107.57 pdf download

ASME B107.57 pdf download BRICKLAYERS’ HAMMERS AND PROSPECTING PICKS: SAFETY REQUIREMENTS
biade:the tapered portion of ihe trieklaycrs” hammer-head directly opposite the face.
chanfer: the angled lat surface r cquivalcnt radiusencircling the perimeler of the face of the bricklayers’hammer and prospccling picks and a1 both ends af thecutting edge of the bneklaycrs” harnmer.cheeks:see sides.
curring edge rbit): the edge directly opposite thc faceof the brickiayers’ harnnerhead at the extreme end ofthe blade.
eye:an apening or apcrture in the bricklayers” hammeror prospecting pick located between the blade or pickand thc face into which the handle is inserted if thehandle is separate.
face: the portion of the bricklayers” hammerhead orprospecting pick head. exclusive of the bell and chamfer,locaied on the end of the head opposite from the bladeor pick end.
handle:the portion that protrudes from the harmner-head or pick head and by which the tool is held.handie grip:material securely attached to the gripend of some sayles of hammer or pick handles.
hardness:the condition of the hammerhead or pickhead resulting frorn heal treatment.
neck:on some bricklayers’ hammers of altemativedesign (see Fig. 1). the portion of the hammerheadbetween the bell and the hammer eye.
pick:the portion of the prospecting pick direclyopposite the face.
safety message: the information irmprinted on or af-fixed to the hammer that is intended to prornotc safety.sides:outside suriaces of the harnncr-head,on eithersidc of the eye. lo-ated between the blade and chanferar neck an tricklayers’ harnmers and the pick end andcharnfer on prospecting picks: also called cheeks.
sop of hananier er pick:the portion of the hamrncroPrDspccling pick head opposite the handle entry.
4GENERAL REQUIREMENTS
4.1 Design
Bricklayers” hammers shall have a facc on one endof thc head and a cutting edge on the opposite endfor use in setting and cutting (splining ) bricks. masonry
tile. concrele tile, and concrete b)ocks and for chippingmortar from bricks. Prospecting picks shall have a faceon onc end of the head and a pick on ihe oppositeend of the head for use in pulling samples from theground.
4.1.1 The faces of the heads shall be fat.
4.1.2 The faces shall have a chamfcr of 45 deg (orcquivalent radiusy all around the perimeter with thewidih equal to appraximately 0.06 in. (1.5 mm).
4.1.3 ihe undcrsidc of the cutting edge or bitof he bricklayers’ harnrner shall have a bevel ofapproximalely 30 deg to 45 deg. The two outer comersof the cutting edge shall have a charnfer of approxi-mately 45 deg or equivalent radius.
4.1.4Handlcs shall be of any design,incldingergonomic，that can withstand the tests specified inparas.4.4.3 and 4.4.4.
4.1.5 The head and handle shall be free of nonfuac-tional sharp edges. points,and surface roughness thatcould inflict personal injury on the user wbile handlingthe bricklayers’ hammer or prospecting pick.
4.2 Materials
4.2.1 Heads shall be made from specia-quality. finc-grain，hot-rolled,carbon steel bars conforming 1o thechemical requirements specified in Table 1 and toASTM A 576 or from an equivalent material such asalloy stecl conforming to ASTM A 322 or ASTM A 681.
4.2.2 Hcads shall bc frce of manufacturing andmalerial defects. such as seams. laps. pipcs. and coldshuts tha1 could jeopardize sound construction. Theyshall conform to requirements for rnechanacal propertiesspecihed in para. 4.3 and shall wichstand the stnkingtest specified in para.斗.4.3.