Reinforced Steel Galvanized Single Lane Bailey Truss Bridge of Long Span

Bailey Bridge is very popular and extensively used in various field.With the feathers of simple structure,convenient transport, speedy erection and easy disassembling,it also has its advantages in heavy loading capacity, great stability and long fatigue life being capable of an alternative span.
 Introduction
1.High strength and big stiffness,relative to the concrete bridge can be reduce tubercular high and self-respect.
2.Due to the steel isotropic, quality of a material is  uniform and modulus of elasticity, that make steel bridge in the working condition and calculation compared with the assumption.
3.Steel bridge generally USES factory,site splicing, the construction period is short,processing convenient and not affected by seasonal effect.
4.Steel bridge is suitable for industrialized manufacture and very convenient to transport.
5.Steel bridge is easy to repair and replace,long lifetime,material can be recycled,components, light weight and low cost.
Bridge usage& maintenance
Following maintenance measure shall be adopted while using the bridge
1. Signs on bridgehead traffic signs shall be set on both bridgeheads,showing load level, speed limit etc. with strict precaution against overload.If necessary, adopt compelling measures for load and speed limit.
2.Regular Inspection and maintenance,which shall include
1 check regular various pins,bolts,beam clamps and sway braces,so as to maintain in a proper status.
2.check regular whether there is any uneven sedimentation to the bed plate of girder and block of bridge approach, and deal with any problems immediately.
3.Smear grease around the pin for preventing rainwater from entering the aperture of pinhole.Smear grease around the outer part of bolt for preventing against rust.
4.Measure regularly the mid-span deflection for finding whether there is gradual enhancement.The speed of deflection enhancement shall be in direct proportion with the wearing degree of pin and pinhole,and the enhancing degree shall be very small.If the speed of deflection enhancement is too fast, it shows that there's damage to pin, pinhole,upper or lower truss chord member(including reinforced chord member),therefore, detailed inspection shall be made for adopting measurement.
5.Check regular whether there is any crack to the male end of lower truss chord member.If  there is any,measure the length of crack,and take monitoring measurements for preventing the truss from damaging,and replace the truss in time.
6.Check regularly whether there is any fracture, curve or unevenness to bridge plate.replace the damaged immediately.If there is frequent pass of creeper truck on the bridge,track plate should be paved for avoiding fast abrasion.
7.Bridge components or accessories,except the touching parts,have painted two coats of paint.For long usage and protecting the steel material,the best thing would be to paint all one coat after erecting the bridge.Some components need pre-paint before erection.
8.Clean the bridge deck regularly.