I IS 4000 1992 – High Strength Bolts in Steel structures – code of Practice II IS 3757 – 1985 reaffirmed 2003 – Specifications for high strength structural bolts III IS 6623 2004 High Strength Structural Nuts Specifications IV IS 6649 1985N A 210 Min 450 Typical 500 Min 700 Typical Tensile Strength The maximum load in tension pulling apart which a material can withstand before breaking or fracturing Yield Strength The maximum load at which a material exhibits a specific permanent deformation Proof Load An axial tensile load which the product must withstand without 800 N mm2 M12 Bolt Shear Strength 40 kN Example shown above against adjacent machine parts HIGH TENSILE AND YIELD STRENGTH HIGH SHEAR STRENGTH Three screws do the work of five Clearance for socket wrench No wrench clearance The characteristics for an M12 bolt assembly have been defined as these bolt assemblies are available in the market Designation of high strength Property Class 8 8 bolt assemblies has not changed from the previous version of AS NZS 1252 AS NZS 1252 1 Torque value based on 75 of proof load and finish as recieved steel NOTES Left hand side of is minimum value Right hand side of is maximum value Eg 0 5 0 7 min is 0 5 and max is 0 7 Eg 0 8 max is 0 8 no minimum value Eg 2 0 min is 2 0 no

2014 8 1 nbsp 0183 32 High Strength Bolts August 1 2014 includes April 2015 Errata Supersedes the December 31 2009 Specification for Structural Joints Using High Strength Bolts Prepared by RCSC Committee A 1 Specifications and approved by the Research Council on c o Bolt clamp pre load force is calculated using the bolt material proof strength and its tensile stress area It is calculated using the following formula F i 0 75 x S p x A s where F i Bolt Clamp Pre Load Force lb f 75 Percentage of bolt material proof strength 75 in this example 2015 10 12 nbsp 0183 32 Rarely is a high strength steel needed for anchor bolts as the mode of failure is almost invariably the concrete not the steel Therefore A307 or Grade 4 6 anchor bolts are very common and should be used when strong enough because they are more ductile High Tensile Strength Rag Bolts 64 INR Get latest price MOQ 1 Piece Product Type Half and Full Usage Industrial and Infrastructure Length 300 Millimeter mm The function of the anchor is to transmit load from a fixture to the connected concrete member 1 3 3 2 Anchor channel A profiled steel element with integrated anchors that is installed in position prior to the casting of concrete 1 3 3 3 Anchor group Two or more

2020 6 29 nbsp 0183 32 January 25 2018 By Birmingham Fastener Structural bolt stickout is just what it sounds like – it s the amount of threads protruding beyond the nut after installation While the RCSC does specify a minimum for bolt stickout they do not specify a maximum That being said there are risks to consider with too much bolt stickout Why Bolt Preload is Important Over the last fifty years great improvements have been made by the fastener industry in improving the design and reliability of their products However no matter how well designed and made the fastener itself is it cannot alone make the joint more reliable Fastener selection based upon an understanding of the 2009 11 2 nbsp 0183 32 The ACI318AppendixD for Seismic Design Categories C and higher requires to reduce anchor capacity by 0 75 and by 0 4 due to the ductility The cracked concrete shall be also assumed It is possible to design ductile attachment base plate but watch out for the prying forces which can be very high In most cases the anchorage design won t benefit from the high strength bolt material as the concrete failure modes will govern and the use of high strength bolt will make the anchor ductile design almost impossible Tensile strength while high strength steel and full diam eter bolts will increase Shear strength MINIMUM EMBEDMENT The minimum penetration of the anchor into the base material at which it will perform safelyand consisentt lyS hell ypest ar e designed o t

2019 1 30 nbsp 0183 32 The anchor bolts used were a threaded stud having a 10 mm diameter and 130 mm length and manufactured from class 5 8 strength steel which is classified to BS EN ISO 898 1 2013 The specified nominal ultimate tensile strength was 500 N mm 2 2020 11 6 nbsp 0183 32 ANCHOR CHAIN As a rough guide to the right size chain for your boat in 8mm Grade 30 chain is sufficient for boats up to about 37ft 10mm up to 45ft and 12mm above that but the displacement of the boat is an additional factor There is also clearly a difference in the chain needed for weekend pottering and extended high latitude cruising PROPERTIES OF GRADE 8 8 BOLT amp NUT ISO BOLT SIZE PITCH STRESS AREA MM2 BOLT STUD SCREW ISO 898 1 Gr 8 8 NUT ISO 898 2 Gr 8 PROOF STRESS N MM2 PROOF LOAD KN TENSILE STRESS N MM2 TOUR QUE N m HARD NESS Learn more about this webinar including accessing the course slides and receiving PDH credit at https www aisc org education continuingeducation education 2020 6 5 nbsp 0183 32 A grade 8 bolt is the highest grade SAE bolt Grade 8 bolts have a minimum tensile strength of 150 000 PSI As a comparison the ASTM A325 bolt is roughly equivalent to the SAE grade 5 A grade 8 bolt would be one that meets ASTM A490 standards

2 2 Anchor bolt specification The anchor bolts used were a threaded stud having a 10mm diameter and 130mm length and manufactured from class 5 8 strength steel which is classified to BS EN ISO 898 1 2013 The specified nominal ultimate2Bolt Loading Notes It is accepted that a bolt preloaded to a fixed value is safer than a bolt simply tightened to an arbitrary value A preload of about 80 of the proof strength of the bolt material is normally used Assume a bolt is used to clamp a joint to a set preload The core difference between a high strength anchor bolt and a normal bolt is not the strength of the material used but form of force The essence is whether to apply pre tightening force and use static friction to shear In fact in British standard high strength anchor 2018 9 17 nbsp 0183 32 HSFG stands for High Strength Friction Grip and as the name suggests they make use of friction Where a traditional bolt will stop the plates in a connection from moving apart by supporting the weight on the bolt shank in the form of shear stress an HSFG supports the weight by clamping the plates so tightly together that they can t slip past Get here listings of high strength bolts high strength bolts manufacturers suppliers and exporters The high strength bolts offered by Indian manufacturing companies are high in demand It has been immense pleasure being associated with Tradeindia since more

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