5-148 be repeated for the minimum vertical load indicated on the Plan s for the bearings selected. The results shall not exceed that specified for the design. A proof load test shall also be performed on each test bearing by applying a load equal to 150% of the maximum vertical load indicated on the Plans for the bearings selected for a period of one hour. The test bearings shall show no sign of fa ilure or other defects while under load or subsequently upon disassembly and inspection. Before testing, the testing equipment and procedure shall be su bmitted to the Fabrication Engineer for review.
523.40 thru 523.49 Reserved - Spherical Bearings
523.50 Method of Measurement Bearings will be measured for pay ment by each unit,
tested and accepted. Bearing installation will be measured for payment by each unit in place and accepted.
523.51 Basis of Payment Bearings will be paid for at the contr act unit price each, which
price shall be full compensation for the design, fabrication, t esting, and delivery. Bearing installation will be paid for at the contract unit price each w hich price shall be full compensation for installation, including all materials, equipme nt, labor and incidentals necessary for installing the bearings in accordance with the Pl ans and this specification. Removal of the existing bearings , if present, including all mat erials, equipment, labor and incidentals necessary for jacking the superstructure, removal o f the existing bearings and preparation of the bridge seat in accordance with the Plans and this Specification, shall be considered incidental to bearing installation. Payment will be made under: Pay Item Pay Unit
523.52 Bearing Installation E a c h
523.5301 Steel Bearings, Fixed, Sliding Plate E a c h 523.5302 Steel Bearings, Expansion, Sliding Plate Each 523.5303 Steel Bearings, Fixed, Rocker E a c h 523.5304 Steel Bearings, Expansion, Rocker E a c h 523.5401 Laminated Elastomeric Bearings, Fixed Each 523.5402 Laminated Elastomeric Bearings, Expansion Each 523.5403 Plain Elastomeric Bearings E a c h 523.5551 Pot or Disc Bearings, Fixed E a c h 523.5552 Pot or Disc Bearings, Expansion E a c h 523.5601 Spherical Bearings E a c h SECTION 524 - TEMPORARY STRUCTURAL SUPPORTS 5-149
524.01 Description This work shall consist of the designing, f abricating, erecting,
maintaining, and dismantling of temporary structural support(s) as called for on the Contract Plans, all in conformity with these specifications. Temporary structural supports proposed by the Contractor to facilitate the work shall also conform to these specifications.
524.02 Materials Materials used may be either sawn timber or s teel, or a combination of
both, at the Contractor's option, and, whether new or used, sha ll be sound and of adequate cross section for the intended loads. Blocking needed below th e temporary supports to accommodate differences in elevation, and/or pads required to d istribute loads to the soil may additionally incorporate plain and reinforced concrete.
524.03 Design Temporary structural support(s) shall be designe d to support all vertical
loading including live load and impact, differential settlement forces, horizontal and longitudinal forces, and shall account for any temporary unbala nced loading due to jacking forces and other loading during loa d transfer. Sufficient redu ndancy shall be designed into the support structure so that failure of one member will not ca use the collapse of the entire system and the supported structure. Temporary support(s) shall be designed by a licensed Professional Engineer and all plans, computations, and working drawings shall be signed by that Engineer, and shall be submitted to the Resident for appro val. Temporary supports which are adjacent to traveled ways or which support structures carrying traffic, shall additionally be designed to resist any vibration or impact forces due to traffic and shall incorporate sufficient protection against imp act by errant vehicles.
524.04 Erection and Removal The erection of temporary support( s) shall be in strict
conformance with the approved design and details and shall use only the materials approved for use. No loads shall be pl aced on the temporary support(s) until the Contractor’s Professional Engineer has provi ded written certification to the Resident that the system was erected in conformance with the approved plans and design detai ls. The consent of the Department regarding design, construction or use of temporary supports shall not be construed, in any way, as relieving the C ontractor of its responsibility to provide supports that are adequately designed and constructe d to carry the loads that will be placed upon them. The work shall be entirely at the Contract or's risk. Upon completing the work requiri ng the use of the temporary str uctural supports, the temporary support structures shall be removed and the area unde r and around them shall be restored to its original condition.
524.05 Method of Measurement Temporary structural supports wil l be measured as the
number of individual units called for on the Plans, satisfactor ily designed, erected, and dismantled. Temporary supports used by the Contractor for thei r convenience will not be measured for payment. The work associated with removal and rei nstallation of existing highway appurtenances (e.g. guardrails, sign supports, etc.) to facilitate the erection of temporary supports will not be measured for payment, but will b e considered incidental to the Temporary Structural Support Pay Item.