709.1(g) 709.4(a) steel reinforcement bars conforming to AAS HTO M 334 , modified as follows:
• Section 13 . Finish Subsection 13.2. “Seams and surface irregularities will not be cause for rejection provided the weight, dimensions, cross -sectional area, and tensile properties are not less than the requirements of this specification. Visible mill scale oxidation or corrosion deposits are cause for rejection.”
709.2BAR MATS —Steel Bars, Section 709.1, assembled into mats, as shown on the Standard Drawings ,
by rigidly welding or clipping the bars at joints or points of intersection.
fracture in mat fabrication. For manual assembly, use No. 12 gage spring steel wire of high elastic limit, conforming to the following chemical analysis:
Percent Element Min. Max.
Carbon 0.45 0.70 Manganese 0.90 1.20 Sulfur 0.00 0.045 Phosphorus 0.00 0.045 Silicon 0.08 0.12
constant pressure. Assemble at the point of manufacture, using clips of acceptable design, and fasten by mechanical means. Use double -latching type clips for manual assembly. Use some form of locking device on the clips' free or latching ends so that when the clips are latched in place, no creeping occurs that would allow the bars to be easily moved from their necessary positions. Provide, approximately, a 1 -inch spread of the clips at intersections for necessary leverage to hold bars at right angles. Latch each alternate clip at right angles to the adjacent clips, to ensure maximum rigidity. Use clips of a length so the material is not stressed beyond the elastic limit during the latching process. A minimum length of 3 1/2 inches is necessary for No. 3 to No. 10 bars. Other types of clips that ensure equal rigidity may be submitted for acceptance.
709.3STEEL WELDED WIRE FABRIC —ASTM A 1064 Grade 70 . From a manufacturer listed in Bulletin 15,
rigidly welded at joints and points of intersection to form a fabric reinforcement, and as shown on the Standard Drawings .
Coated Welded Wire Fabric. Galvanize in accordance with ASTM A123 with a coating grade consistent with the measured wire diameter of the fabric . Chromate in accordance with ASTM A767, Section 6.8.
709.4DEFORMED WELDED WIRE FABRIC —ASTM A 1064 Grade 75 . From a manufacturer listed in
Bulletin 15 and as shown on the Standard Dr