00810.15 849 PART 00800 - PERMANENT TRAFFIC SAFETY AND GUIDANCE DEVICES
Description
00810.00Scope - This Work consists of constructing metal guardrail and metal Median barrier to the
lines and grades shown or established and includes the assembly and erection of all components, parts and M aterials complete at the locations shown or directed. Metal guardrail and metal M edian barrier will be referred to in this Section as "guardrail". The types of guardrail will be shown.
Materials
00810.10Materials - Furnish Materials meeting the following requirements:
Guardrail Anchor Hardware ................................................................... 02820.40 Guardrail Hardware ............................................................................... 02820.30 Metal Beam Rail .................................................................................... 02820.10 Metal Posts ........................................................................................... 02820.20 Guardrail Blocks .................................................................................... 02110.20 Wood Guardrail Posts ........................................................................... 02110.10 Use guardrail terminals from the QPL.
00810.11Posts - Posts, except as specified for use on Bridges or otherwise shown or directed, m ay
be of steel or wood, as the Contractor elects. Once a type has been selected, use it throughout the continuous run of guardrail except in the transitions and terminals.
00810.12Median Barrier on Bridges - Metal Median barrier on bridge decks shall be comprised of
metal beam rail, metal posts, and hardware conforming to 00810.10.
At expansion joints on bridge decks, the slots in the rail member for post bolt and rail joint bolts shall be of special dimensions as shown.
00810.13Guardrail Anchors - Furnish steel g uardrail anchors according to Section 02820
Furnish one guardrail anchor cable assembly per Project for testing according to AASHTO M 30.
00810.14Condition of Materials - All Materials will be subject to inspection of condition at the latest
practical time available before or during incorporation of Materials in the Work .
00810.15Salvaged Materials - Materials salvaged as part of removal Work on the Project may be
reused in new construction, if the Engineer determines the M aterials conform to current design,
, and the following:
not be incorporated into new guardrail Work .
of breaks, kinks, dents, damage to galvani zed coating, or any other damage that would affect the integrity of the member. If paint is removed from metal beam rail members salvaged from the 00810.40 850 Project, remove the paint at a location outside of the Highway Right-of-Way, and in a manner that will not d amage the galvanizing. Repair minor damage to galvanizing according to 00810.43.
Construction
00810.40Timing and Coordination of Work - Time and coordinate construction of guardrail to hold
disturbance of Bases, Surfacings and Pavements to a minimum.
Place all salvaged metal guardrail or metal Median barrier M aterials in continuous runs.
Do not leave posts installed for guardrail and Median barrier exposed to traffic for more than 24 hours before installing the rail members, rail end pieces and anchors and tightening all bolts, except replacement rail shall be installed according to 00310.40(a).
00810.41Excavation and Backfill - Subject to 00810.42, excavate to the lines, grades and depths
shown or established. Make cuts through Pavement by mechanical means, such as knife-edge cutters or rotary drills. Make cuts below the Pavement by auger or other means that will prevent undue disturbance of abutting areas. Avoid fouling existing B ases and Pavements. Repair or replace, as directed, all M aterials that become fouled, at no additional cost to the Agency. Remove water and Unsuitable Material that wo uld impair stability of the backfill, from areas to be backfilled.
In areas occupied by Aggregates, bituminous material and Pavements, backfill with like Materials to the same thickness and density as the adjacent materials. In other areas, backfill with granular backfill Materials meeting the requirements of 00330.14. Place all backfill in layers not exceeding 6 inches and compact each layer to a firm, dense condition.
Remove, replace, repair, or restore, as directed, adjoining areas that become misshapen or disturbed during excavating and backfilling operations at no additional cost to the Agency. Dispose of excess materials according to 00330.41(a)(4).
00810.42Installation of Posts and Anchors - Place posts and anchors as shown. If directed, install
8 foot guardrail posts. Set posts in excavated holes or drive them in place. If posts are driven through the Bases, Surfacings, or Pavement , repair all damage as directed. Remove and replace posts, anchors or other components damaged during installation with sound components. Firmly set all posts at proper line, grade and spacing within a tolerance of 1/2 inch. Rigidly attach anchors, terminals and connections to other Structures as shown.
When metal posts are required over box culverts, cattle passes, Equipment passes or other concrete Structures, place steel posts, base plates, or base plate concrete anchors as shown or directed.
00810.43Erection of Rails and Other Components - Normally, al l fabrication of metal beam rail
members and other components shall be done in the shop or by the manufacturer. Limit field cutting, drilling and other field fabrication to the minimum and perform in a manner that will not impair the appearance or structural quality of the material. Burning new holes in metal beam rail members is not allowed. Restore to specified condition, surface finishes and protections that are damaged before or during erection. Repair the cut ends of galvanized bolts, rail elements and back -up plates, and any holes drilled or punched after galvanizing according to ASTM A780. Minimum zinc content for Method A2 is 94 percent on the dry film. Toe nail blocks to post with two 16d, galvanized, flat head nails to prevent rotation.
Draw tight all bolts. Bolts shall be of sufficient length to extend slightly beyond the nuts.
00810.90 851 00810.45 Painted Guardrail - Projects that include the removal and dismantling of painted metal guardrail require that environmental protection and worker safety precautions be established. If painted guardrail is reused in any application, comply with DEQ/EPA and OSHA regulations pertaining to paint removal.
Measurement
00810.80Measurement - The quantities of guardrail items constructed under this Section will be
determined as follows:
• Length - Measurement will be on the length basis, measured by one of the following methods:
• Count Method - The number of standard sections will be counted and multiplied by 12 1/2 feet. For purposes of thisS ubsection, a "standard section" is defined as 12 1/2 feet of complete guardrail or M edian barrier, without regard to the number of posts or rail elements used. Non- standard sections will be measured from center of post to center of post, and added to the t otal calculated length of the standard sections for each run.
• Length Method - Measurement will be from center to center of end posts, or as otherwise shown, along the line and grade of each run of each type.
• Unit - Measurement will be by actual count.
Payment
00810.90Payment - The accepted quantities of Work performed under this Section will be paid for
at the Contract unit price, per unit of measurement, for the following items:
Pay Item Unit of Measurement
In item (a), the type of guardrail will be inserted in the blank. Item (a) includes all posts including steel, base plates, and base plate concrete anchors.
Items (a) , (b), and (k) include constructing the respective items except for:
• end pieces • anchors • transitions • extra costs involved in constructing guardrail connections to existing Bridges • terminals 00810.90 852 guardrail height conversions
In item (c), the type of anchor will be inserted in the blank. In item (d), the type of guardrail end piece will be inserted in the blank. Item (e) includes preparing the bridge rail or concrete barrier for the transition and includes posts, rail elements, terminal connectors, connection plates, anchor bolts, and all necessary appurtenances and hardware.
Item (f) includes preparing the bridge rail or concrete barrier for the connection and installing the terminal connectors when there is no guardrail transition item and includes connection plates, anchor bolts, and all necessary appurtenances and hardware. In item (g) the type of terminal will be inserted in the blank. Item (g) includes guardrail terminals, posts, anchors, rails, guards, end pieces, struts, Soil tubes, and all necessary appurtenances and hardware.
In item (h) the length of post will be inserted in the blank. Item (h) includes installing 8 foot long or longer posts inst ead of standard 6 foot long posts, The extra costs for the longer posts are costs that are not covered and included in the unit price for one or more of the other listed Pay Items.
Item (i) includes only installing posts when upgrading or repairing existing guardrail installations. In item (j), the extra costs for hand dug holes are costs that are not covered and included in the unit price for one or more of the other listed Pay Items.
Payment for item (j) performed beyond the quantity shown in the Cont ract Schedule of Items will be made at the Contract unit price if the Engineer determines that the Contract unit price does not exceed the value of the W ork as determined according to Section 00197. If the Engineer determines that the Contract unit price exceeds the value of the W ork, payment for the Additional Work will be made according to 00195.20. In item (k), the type of guardrail will be inserted i n the blank. Item (k) includes all posts including steel, base plates, and base plate concrete anchors.
In Item (l), the type of guardrail will be inserted in the blank. Item (l) includes posts, rails, and all necessary appurtenances and hardware to con struct the guardrail height conversion.
Payment will be payment in full for furnishing and placing all Materials, and furnishing all Equipment, labor and Incidentals necessary to complete the W ork, as specified.
No separate or additional payment will be made for excavation and backfill.