737 – CONTROLLED DEMOLITION sha ll provide the following information: Plan of the work area showing pe rmanent support structures (piers and abutments), roads, railroad tracks, waterways (including navigational channe l), overhead and underground utilities and other information pertinent to erection. Erection sequence for all members noting any temporary support conditions, such as holding crane positions, temporary supports, falsewor k, etc. Member reference marks, when reflected on the erection plan, should be the same as used on shop detail drawings. In the Field Erection Plans, describe the number, location and bolting requirements for the permanent cross-frames or diaphragms for each stage of construction. In the Field Erection Plans, address the expected condition of each bearing device for each stage of construction. State the minimum number of positive bearing connections or su pplemental connections to each bent cap which will resist all potential destabilizing forces. In the Field Erection Plans, address traffic control and railroad issues. If falsework bents or strong-backs are used, the Fiel d Erection Plans shall meet falsework requirements as defined in SECTION 708 .
Location of each crane fo r primary picks showing all necessary information. Capacity chart for each crane configuration. Center of gravity, lift weight (including rigging) for all primary member picks. Primary member site delivery location and storage orientation. Details of any temporary lifting devices to be bolted/welded to or cast in to permanent members, including method and time (shop or field) of attachment, capacity and method, time and responsibility for removal. Temporary support details for bridge bearings.
Requirements for bracing. At the end of the workday, remove the members not properly braced in compliance with the Field Erection Plan from the bridge substructure elements. All rigging must have capacity stamps, tags or be otherwise permanently marked on the device (per OSHA Standards)
737.5CONSTRUCTION REQUIREMENTS
No erection work may begin without an approved Fiel d Erection Plan. The Contractor is responsible for the erection, even though the Field Erection Plans have been approved by the Engineer. See SECTION 105 . Keep the approved Field Erection Plans available on site at all times. Before erection begins, resolve any questions that any party may have. Prepare a Contingency Plan if the number of stable girder lines to be erected does not meet the Field Erection Plan number for a sequence proposed. (i.e. the plan says 6 girder lines and because of problems, 5 girder lines where erected before traffic delay penalties accrued). It is required that all traffic must be stopped wh ile overhead erection work involving the placement of primary members into the permanent structure is being performed. No members shall be suspended over highway traffic at any time during loading, unloading, moving, rigging or placing. In no case will KDOT allow highway/railroad traffic to travel under uncompleted structures without compliance of Fi eld Operation Three above. Erect the fabricated structure and perform all work requ ired to complete the structure as specified in the Contract Documents. Provide a ll falsework, tools, machinery and appliances required to complete the work. After the structure is erected, remove all falsework, appliances and other obstructions or debris resulting from erection. Provide the Engineer with safe means (such as scaf folding, safety lines, snoopers or hoist buckets) to inspect any portion of the structure during the erection operations. The Engineer will refuse permission to proceed with erection work if the erection process is determined to be unsafe or substantially different than approved Field Erection Plans.
737.6MEASUREMENT AND PAYMENT
Erection is considered complete when all field conn ections are completed to the final design condition and falsework is removed. The Engineer will not measure Fiel d Erection and Field Erection Plans for separate payment. 738 – HIGH MAST LIGHT TOWERS
700-136SECTION 738
HIGH MAST LIGHT TOWERS
738.1DESCRIPTION
Construct new high mast light towers as shown in the Contract Documents. Repair existing high mast light towers as shown in the Contract Documents. See SECTION 814 , for Electric Lighting System work.
B I D I T E M U N I T S High Mast Light Tower (*) (**) Each (*) Size (**) Foundation
738.2MATERIALS
Provide high mast light tower structures from the pr equalified list of fabricators. Comply with all requirements and dimensions designated in the Contract Documents.
Use material for High Mast Light Tower structures that comply wi th the applicable requirements: Structural St eel Tu bing ........................................................................................... DIVISION 1600 Grade 4.0(AE) Concrete ........................................................................................ SECTIONS 401 & 402 Aggregate for Concrete Not On Grade .................................................................. SECTION 1102 Concrete Admixtures ............................................................................................. DIVISION 1400 Reinforcing Steel (Grade 60) ................................................................................ DIVISION 1600 Anchor Bolts ......................................................................................................... DIVISION 1600
738.3CONSTRUCTION REQUIREMENTS
modify existing systems as shown in the Contract Documents. See SECTION 744 for fabrication requirements. All utility hookups are subsidiary, unless shown otherwise in the Contract Documents.
to existing structures and right-of-way. Remove the existing concrete foundations (including anchor bolts) to the elevation shown in the Contract Documents. Backfill the re sulting holes according to DIVISION 200 . Dispose of the removed foundations and anchor bolts. Excavate and prepare the foundation according to DIVISION 200 . Grade the area surrounding the completed structure in accordance with the Contract Documents.
ends and anchor bolts securely in the pr oper position when the concrete is placed. Cure the concrete foundations with wet burlap or polye thylene for a period of 72 hours. Prevent concrete temperatures from falling below 32ºF. Do not attach poles until the concrete has cured for 14 days. If a foundation can not be constructed as shown in th e Contract Documents because of an obstruction, the Engineer will determine how to construct the foundation.
above the tightened nut in the final condition. Do not damage the existing anchors during the removal of the existing hardware. Clean the threads of all rust and lubricate with an approved wax, prior to placing the new hardware. Install DTIs on each anchor. Insta ll a hardened washer on each anchor, if required. Use new hardware galvanized according to ASTM A 123. Verify the assembly (leveling nut, hardened washer(s), tower base plate, DTI, top nut) is in a snug tight condition before final tighteni ng begins. Using the approved air pneumatic torque/tension 738 – HIGH MAST LIGHT TOWERS 700-137 wrench, or a hydraulic wrench, tighten each nut to achieve a minimum of three refusals of the 0.005 gauge. Do not exceed four refusals of the 0.005 gauge. After tightening, score the remaining threads.
the anchors shall be free of any construction debris. Install DTIs on each anchor. Install a hardened washer on each anchor, if required. Use hardware galvanized according to SECTION 1616 . Verify the assembly (leveling nut, hardened washer(s), tower base plate, DTI, top nut) is in a snug tight condition before final tightening begins. Using th e approved air pneumatic to rque/tension wrench or a hydraulic wrench tighten each nut to achieve a minimum of three refusa ls of the 0.005 gauge. Do not exceed four refusals of the 0.005 gauge. After tightening, score the remaining threads.
Do not use a pipe wrench to tighten nuts on High Mast Light Tower structures; Use only a box end or socket wrench to snug tighten nuts; Maintain a minimum dimension of 6 inches from the top of foundation to finished grade; Repair any marring of the galvanizing caused while lifting the structure into place; Submit specifications for the air pneumatic torque /tension wrench or the hydraulic wrench to the Construction Engineer for approval; If the four refusal maximum is exceeded on any DTI, discontinue tightening and contact the State Bridge Office.
738.4MEASUREMENT AND PAYMENT
The Engineer will measure each high mast light tower structure for payment. Payment for "High Mast Light Tower" structures at the contract unit price is full compensation for the specified work. 739 – SLURRY POLYMER CONCRETE OVERLAY
700-138SECTION 739
SLURRY POLYMER CONCRETE OVERLAY
739.1DESCRIPTION
Prepare the surface of the reinforced concrete bridge deck and construc t a slurry polymer concrete overlay
Provide an overall combination of labor and equipmen t with the capability of proportioning and mixing the primer, polymer resin components, aggregate and seal coat, and placing the primer, slurry polymer overlay material, broadcast sand or aggregate, and seal coat in accordance with this specif ication and the manufacturer/supplier’s recommendations.
B I D I T E M S U N I T S Slurry Polymer Concrete Overlay (*) Square Yard Material for Slurry Polymer Concrete Overlay (Set Price) Cubic Yard * Thickness
739.2MATERIALS
application recommendations.
the concrete bridge deck. See SECTION 731 .
system, DIVISION 1700 .
manufacturer/supplier.
739.3CONSTRUCTION REQUIREMENTS
before applying the overlay. Portland cement concrete patches require a minimum cure period of 28 days before application of the overlay. At the preconstruction conference, discuss the patching material and the corresponding curing period. Submit changes, including a written statement from the polymer manufacturer/supplier recommending changes, to the Engineer for approval. Some overlay systems require the placem ent of a polymer primer coat and/ or a polymer seal top coat, with or without broadcast sand or aggregate. In the following requirements, the polymer pr imer coat and polymer seal top coat will be referenced with the un derstanding they are system specific.
requirements: 739 – SLURRY POLYMER CONCRETE OVERLAY 700-139 (1) Surface Preparation Equipment.
Concrete Repair Institute (ICRI) Surface Prepar ation Level 6 to 7 or ASTM E 965 Pavement Macrotexture Depth of 0.04 to 0.08 inch. Fi nal acceptance is based on testing procedures as outlined in KT-70, Part V.
adjacent to bridge rails and barriers and ar eas not accessible with shot blast equipment.
bridge deck. On long structures empty shot blas ters on the unprepared surface a minimum of 50 feet from prepared surface to prev ent contamination of the deck by return of dust to the prepared surface.
shot blasted if necessary and prevent ove rrun of the quantities of overlay material.
primer and seal coat unif ormly at the specific rate on 100% of the work area.
polymer resin, hardening agent and aggregates, metered verification of the mix ratio and aggregate proportions and uniform and accurate distribution of the polymer mate rials at the specified rate or thickness on 100% of the work area.
broadcast sand and/or broadcast aggr egate over 100% of the work area.
compressed air to remove all dust and loose material.
specification and the manufacturer/supplier’s recommendations.
polymer resin and hardening agent.
this specification and the manufact urer/supplier’s recommendations.
specification and the manufacturer/supplier’s recommendations.
of the surface, unless placed with the overlay.
blast.
Sand blast or bush hammer contaminated areas to produce an acceptable surface for placement of the overlay.
and/or other approved means, followed by an air blast with dry, oil free air or vacuum. Brooming is not acceptable. Remove all pavement marking, loose disintegrated concrete, dirt, paint, oil, asphalt, laitance, carbonation and curing materials from patches and other foreign material from the surface of the deck.
Level 6 to 7 or ASTM E 965 Pavement Macrotexture Depth of 0.04 to 0.08 inch.
exposed for more than 24 hours must be lightly sand blasted prior to application of the overlay.