ASTMA394TOWERBOLTSisstandardofboltsuseintheconstructionoftransmissiontowers, substații,
andsimilarsteelstructures.Thereare3types: Type0includeshot-dipzinc-coatedboltsmadeoflowor
mediumcarbonsteel, Type1includeshot-dipzinc-coatedboltsmadeofmediumcarbonsteel, stins
andtempered, Type2, andType3includesbare, stins, andtemperedboltsmadeofweatheringsteel.
Steelforthemanufactureofboltsshallbemadebyanyofthefollowingprocesses: deschis-vatra,
eletric-cuptor, orbasic-oxygen.Type1boltsproducedfrommediumcarbonsteelshallbequenchedin
aliquidmediumfromabovetheaustenizingtemperature.Type1boltsproducedfrommediumcarbonsteel
towhichchromium, nichel, molibden, orboronwereintentionallyaddedshallbequenchedonlyinoil
fromabovetheaustenitizingtemperature.Type3boltsshallbequenchedonlyinoilfromabovethe
austenitizingtemperature.Cold-headedType0boltsshallbestressreliefannealedbeforezinccoatingto
removecoldworkeffectssuchthatthehardnessmeasuredanywhereonthesurfaceorthroughthe
cross-sectionshallmeettherequirementspecified.Differenttestsshallbeconductedinordertodetermine
thefollowingmechanicalpropertiesofbolts: duritate, tensilestrength, andshearstrength.
RecommendedNutsforASTMA394TOWERBOLTS
Unlessotherwisespecified, allnutsontheseboltsshallbehexstyleandconformtotherequirementsof
SpecificationA563asfollows.
Finisaj BoltTypeNutGrade
0 Un strat de cald-dipzinc
1 DH acoperit la cald cu dipzinc
3 câmpie DH3
RecommendedWashersforASTMA394TOWERBOLTS
SuitablewashersforusewithType0arehot-dipzinc-coatedcarbon-steelwasherswithdimensionsthatare
inaccordancewithSpecificationF436.SuitablewashersforusewithType1boltsarehot-dipzinc filmate
Type1hardened-steelwashersthatareinaccordancewithSpecificationF436.
SuitablewashersforusewithType3boltsareType3hardened-steelwashersthatareinaccordancewith
Specificație
MaterialsandManufactureofASTMA394TOWERBOLTS
Steelforthemanufactureofboltsshallbemadebyanyofthefollowingprocesses: deschis-vatra,
electric-cuptor, orbasic-oxigen.
HeatTreatmentofofASTMA394TOWERBOLTS
Type1boltsproducedfrommediumcarbonsteelshallbequenchedinaliquidmediumfromabovethe
austenizingtemperature.Type1boltsproducedfrommediumcarbonsteeltowhichchromium, nichel,
molibden, orboronwereintentionallyaddedshallbequenchedonlyinoilfromabovetheaustenitizing
temperature.Type3boltsshallbequenchedonlyinoilfromabovetheaustenitizingtemperature.
ZincCoatings, HotDipofASTMA394TOWERBOLTS
Type0andType1boltsshallbehot-dipzinc-coatedaccordancewiththerequirementsofSpecification
A153 / A153M, exceptthattheminimumaverageweight (grosime) ofzinccoatingshallbe1.65oz / ft2
.
