Pretread.com, a reliable source for bridge bearing, neoprene bridge bearing , elastomeric bearings,  ptfe teflon sliding bearings, steel pot bearing, mechanical steel bridge bearings  sliding bearing ptfe Teflon  pipe supports, rubber modular elastomer expansion joint, rubber gaskets is established from 1999 in United Arab Emirates Dubai UAE with ISO certification for design and manufacturing offer products commonly known as bridge bearing, neoprene bridge bearings rubber bearing, steel mechanical bearing, pot bearing, guided mechanical bearing in neoprene, for  bridge building bearing applications replacement  manufacturer manufacturers design designing types supplier installation

 

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Bearing Design

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Bridge bearing design starts with a bearing schedule and bridge designer is responsible to prepare one, which should contain vital information like detailed list of forces, movements and performance characteristics which is directly from design of bridge or structure.
 
Bridge bearing designs have followed one or combinations of following specifications.
 
AASHTO LRFD Bridge Design Specifications, Customary U.S. Units, 7th Edition, with 2015 Interim Revisions.
 
The AASHTO LRFD Bridge Design Specifications are intended for use in design, evaluation, and rehabilitation of bridges, and are mandated by the Federal Highway Administration for use on all bridges using federal funding. These Specifications employ the Load and Resistance Factor Design (LRFD) methodology using factors developing from current statistical knowledge of loads and structural performance.
 
AASHTO M215-2006
 
AASHTO M 251-2006 standard specification for plain and laminated elastomeric bridge bearings This specification covers material requirements for plain and laminated elastomeric bridge bearings. Elastomeric bearings furnished under this specification shall adequately provide for thermal expansion and contraction, rotation, lateral and transverse movements of bridge structure.
 
BS 5400 – British  Standards.
 
BS 5400 is British Standard code of practice for design and construction of steel, concrete and composite bridges, which is applicable to highway, railway and pedestrian bridges. BS 5400  standard  includes  specification and calculation of standard bridge loads,  application of  limit state principles,[4] analysis, and fatigue load calculation[5] and  reservoir method for fatigue load cycle counting.[5].
 
BS 5400 standard also specifies  requirements and code of practice[1][2] on design of steel,[1] concrete (reinforced, prestressed or composite)[2] and composite bridges that use steel sections (rolled or fabricated, cased or uncased)[3] as well as  materials and workmanship in bridge erection.
 
Some part of standard is partially replaced by BS EN 1337-2 (EN 1337-2), BS EN 1337-3 (EN 1337-3), BS EN 1337-5 (EN 1337-5) and BS EN 1337-7 (EN 1337-7), and replaced by BS EN 1337-4 (EN 1337-4) and BS EN 1337-6 (EN 1337-6) but remains current)
 
BS EN 1337-3:2005
 
After formation of European Union in 1999 BS 5400 has been amalgamated into BS EN 1337-5:2005 which specifies requirements for  design and manufacture of elastomeric bridge bearings, pot bearings and ptfe Teflon sliding bearings.  
 
Australian Standard ™ Bridge design Part 4: Bearings and deck joints -AS 5100.4—2004  AP-G15.4/04.
 
This Standard was prepared by the Standards Australia Committee BD-090, Bridge Design to supersede HB 77.4—1996,  Australian Bridge Design Code Section 4: Bearings and deck joints and AS 1523, Elastomeric bearings for use in structures. The AS 5100 series represents a revision of the 1996 HB 77 series, Australian Bridge  Design Cod, which contained a separate Railway Supplement to Sections 1 to 5, together with Section 6, Steel and composite construction, and Section 7. AS 5100 takes the requirements of the Railway Supplement and incorporates them into Parts 1 to 5 of the present series, to form integrated documents covering requirements for both road and rail bridges. In addition, technical material has been updated. This Standard is also designated as AUSTROADS publication AP-G15.4/04.
 
Above standards are available to purchase from internet through authorized sellers  as they all come under copy compliance- copyright requirements  and please follow basic guidelines in copying them:
 
Buying a standard, purchase is in a particular format, like paper or pdf. and  do not have  right to transform  document into another format or to copy it at a photocopier to make additional copies at photocopy machine.

Download a standard, a license agreement that has been accepted prior to retrieving the document  and  license nome requires that to save  document on 1 computer for  use of 1 person only (single user license), though  It's OK to back up  file so that if computer crashes, that’s the way to recreate  copy.  Normally allowed to print 1 paper copy from the pdf file and  this paper copy would used   as any other book or document. Copying and circulating these intellectual articles are punishable as per prevailing international and national laws
 
 

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