- 753 - SECTION 915 -- GRANULAR SUBDRAINS
915.01 Description
1.The Contractor shall construct granular subdrains as described in the contract.
915.02 Material Requirements
1.Aggregate that is used in gra nular subdrains shall conform to the gradation requirements for Gravel Su rfacing shown in Table 1033.07 of Subsection 1033.02.
915.03 Construction Methods
1.The Contractor shall excavate subdrain trenches to the dimensions and the elevations show n in the contract.
2.The Contractor shall provide and place aggregate in the trench as described in the contract.
3.After the aggregate has been pl aced, the trench shall be backfilled to the shoulder surface.
4.All backfill material shall be compacted to a density equal to the density of the adjacent shoulder.
5.Surplus material shall be disposed of on adjacent slopes.
915.04 Method of Measurement
1.The "Granular Subdrain" shall be measured by the each.
915.05 Basis of Payment
1.P a y I t e m P a y U n i t Granular Subdrain, Type ______ Each (ea) Granular Subdrain Each (ea) 2. Payment is full compensation for all work described in this Section. - 754 - SECTION 916 -- CATCH BASINS, MANHOLES, INLETS, AND JUNCTION BOXES
916.01 Description
1.The Contractor shall construct catch basins, manholes, inlets, junction boxes, and similar concrete struct ures as described in the contract.
916.02 Material Requirements
1.All materials shall conform to the requirements in Table 916.01. Table 916.01 Material Requirements Applicable Materials Section Concrete Risers and Tops ...................... 1037 Portland Cement Concrete ..................... 1002 Reinforcing St eel .................................... 1020, 1022, 1023 Structural Steel ....................................... 1045 Steel Casti ngs ........................................ 1050 Gray Iron Castings ................................. 1051 Paints and Paint Material s ...................... 1077
2.Concrete shall be Class 47B-3,000 (47B-20).
916.03 Construction Methods
1.The Contractor shall excavate to the dimensions shown in the contract.
2.The Contractor shall backfil l as described in Section 702 for culverts.
3.Reinforcing steel shall be handled and placed in accordance with the requirements of Section 707.
4.Concrete construction shall be performed in accordance with the requirements of Section 704.
5.The foundation excavation sha ll be dewatered and stable before concrete is placed.
6.a. When footings can be placed on the dry excavation without the use of cribs or cofferdams, back forms may be omitted when the soil will provide a smooth, plumb surface.
b.Concrete placed outside the dimensions shown in the contract will be at no additional cost to the Department.
7.a. Structural steel and miscell aneous metals shall be fabricated and placed as provided in Section 708.
b.Castings shall be made in conformance with AWS Standard Specifications.
c.All castings shall be set on full mortar beds or otherwise secured as shown in the contract. They shall be set accurately to the correct elevation so that subsequent adjustments will not be necessary.
8.Structural steel shall be painted in accordance with the requirements of Section 709.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 787–787 of 1,048.