- 620 - SECTION 716 -- STEEL RAILINGS
716.01 Description
1.This work shall consist of fu rnishing, erecting and painting steel handrail, bridge rail, rail elements, rail posts, barrier rail, pedestrian railing, and all connecting bolts and anchors in accordance with the requirements of the contract.
2.The plans shall be supplemented by working drawings submitted in accordance with the requirem ents of Subsection 105.02.
716.02 Material Requirements
1.The materials shall conform to the requirements in Table 716.01. Table 716.01 Material Requirements Applicable Materials Section Structural Steel ........................................... 1045 Structural Threaded Fasteners ................... 1057, 1058 Steel Pipe for Rails and Posts .................... ASTM A 53, Grade B Chain Link Fence and Hardware ................ 1064 Steel Tubing ............................................... ASTM A 500, Grade B
2.Anchor bolts shall meet the r equirements of Section 1058 unless otherwise specified in the contract. The bolt projection shall be galvanized.
716.03 Construction Methods
1.The Contractor shall build raili ng to the lines, grades, and vertical and horizontal curves shown in the contract.
2.The Contractor shall set rail posts plumb. Concrete areas upon which railing posts are to be set shall be dressed to provide even bearing.
3.The Contractor shall paint a ll exposed metal except galvanized and weathering grade steel as described in Section 709.
4.The Contractor shall repair galvanized coating which has been scarred, burned, or otherwise damaged in accordance with Section 1061 at no additional expense to the Department.
716.04 Method of Measurement
1.Structural steel for handrails and bridge rails is measured by the pound (kilogram).
2.Pedestrian barrier rail, pedestr ian handrail, and pedestrian railing (chain link type) shall be measured by the foot (meter). The quantity to be paid will be the distance in feet (meters ) between centers of end posts, with no allowance for splices, joints, overhangs, or end sections.
3.The Department computes plan quantities from end post to end post, measured horizontally, with no adjustments made for changes in elevation. Steel Railings 716.06 - 621 - 716.05 -- Basis of Payment
1.P a y I t e m s P a y U n i t Structural Steel for Handrail Pound (lb) [ K i l o g r a m ( k g ) ] Structural Steel for Bridge Rail Pound (lb) [ K i l o g r a m ( k g ) ] Pedestrian Barrier Rail Linear Foot (LF) [Meter (m)] ______ Pedestrian Railing Linear Foot (LF) (Chain Link Type) [Meter (m)] Pedestrian Handrail Linear Foot (LF) [Meter (m)]
2.Payment is full compensation for all work described in this Section. - 622 - SECTION 717 -- CONCR ETE BOX CULVERTS
717.01 Description
1.This work shall consist of the construction of concrete box culverts. Concrete Box Culverts shall be constructed in accordance with these Specifications and in conformity with the lines, grades, dimensions, and designs shown in the contract.
717.02 Material Requirements
1.Concrete shall meet requirements of Section 1002.
2.Reinforcement shall be furnished, handled, and placed in accordance with the requirements of Section 707.
3.Crushed rock shall meet the general aggregate requirements of Section 1033.
717.03 Construction Methods
1.The Contractor shall not order box culvert materials like reinforcing steel and form lumber until the Engineer provides a field checked order list.
2.Excavation and backfilling shall be performed by the Contractor in accordance with the requirements of Section 702.
3.Concrete construction shall be performed by the Contractor in accordance with the requirements of Section 704.
4.Foundation excavations shall be as dry as practicable before concrete is placed.
a.The Contractor may elect to use crushed rock or crushed concrete as a base for the floor of the box culvert. Riprap Filter Fabric shall be placed under all rock.
b.Any unsuitable material encountered during the box culvert construction shall be excavated and removed from the site. The resulting void may be filled with crushed rock or crushed concrete as directed by the Engineer.
5.Dirt, mud, or other foreign ma terial shall not become mixed with concrete which is being placed in footings and curtain walls.
6.Fence Connections:
a.Fence connections require t hat a 3/4 inch (19 mm) diameter hole shall be cast through each wing of new or extended concrete box culverts with rises of 5 feet (1.5 m) or greater.
b.This hole shall be located 4 feet (1.2 m) above the box flowline near the end of the wing and shall be a minimum of 4 inches (100 mm) from the end and top surfaces of the wing.
7.Extensions: a. When box culverts are extended, if the existing thickness is different than the new, the new shall be adjusted by forming a variable thickness in the first 2 feet (600 mm) of the extension.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 654–655 of 1,048.