- 882 - SECTION 1044 -- BAR GRATES FOR FLARED END SECTIONS
1044.01 Description
1.This Specification covers bar grates for use with metal and reinforced concrete flared-end sections.
1044.02 Material Characteristics
1.Bar grates shall be constructed as described in the contract. Bar grates shall be fabricated from plates and round smooth bars complying with the requirements of ASTM A 36/ A 36M or ASTM A 575, Grade 1020.
2.Coatings a . P a i n t
1.Two separate coats of paint shall be applied to the grates in accordance with Section 709.
2.The first coat shall be inorganic zinc-silicate primer. (3) The second coat shall be brown or beige paint. (4) All painting may be done in the shop.
5.All paint shall comply with the requirements of Section 1077.
b.TGIC Polyester Coating (1) Acceptable coating materials are on the Department’s Approved Products List.
2.Apply the coating as recommended by the manufacturer (3 mil (76 m) minimum).
c.Galvanized (1) Hot-dip galvanized in accordance with ASTM A 123.
1044.03 Acceptance Requirements
1.Bar grates will be accepted on t he basis of a fabric ator’s certificate showing compliance with these Specifications. - 883 - SECTION 1045 -- STRUCTURAL STEEL
1045.01 Description
1.Structural steel, unless otherw ise specified, shall be furnished in accordance with the general requirement s for delivery of structural steel, ASTM A 6/A 6M (Zone 2 requirements).
1045.02 Material Characteristics
1.Structural steel shall confor m to the requirements shown in the contract.
2.Notch toughness is mandatory for structural steel designated in the contract as main tension members. The structural steel shall meet the longitudinal Charpy V-notch tests as specified in the ASTM Nonfracture Critical and Fracture Critical Impact Test Requirement Tables.
3.Sampling and testing procedures shall be in accordance with AASHTO T 243.
4.Impact requirements shall be as shown in the contract. 1045.03 -- Steel Plate Substitution
1.The Contractor may use either English or Metric steel plates in accordance with Table 1045.01. Table 1045.01 English-Metric Steel Pl ate Substitution Table Metric (millimeters) English (inches) Metric (millimeters) English (inches) 9 3/8 32 1 1/4 10 3/8 35 1 3/8 11 7/16 38 1 1/2 12 ½ 40 1 5/8 14 9/16 45 1 3/4 16 11/16 50 2 18 ¾ 55 2 1/4 20 13/16 60 2 3/8 22 7/8 70 2 3/4 25 1 80 3 1/4 28 1 1/8 90 3 1/2 30 1 ¼
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 916–916 of 1,048.