624CALCIUM CHLORIDE FOR DUST CONTROL

624-1.01 DESCRIPTION . Furnish and apply calcium chloride on the subgrade, base, or

aggregate surface course to control dust during construction operations. Use calcium chloride at locations and times specified or directed.

624-2.01 MATERIALS. Use materials that conform to the following:

Calcium Chloride AASHTO M 144, Type S, Grade 3

624-3.01 CONSTRUCTIO N REQUIREMENTS. Moisten the surface as directed before and after

applying dry calcium chloride. Uniformly distribute and mix dry or liquid calcium chloride in the top 1- 1/2 inches of road surface. Spread first application of calcium chloride at a rate of 1 pound per square yard of dry form equivalent for the full width of roadway. Apply additional calcium chloride at a rate of 1/2 pound per square yard for the full width of previously treated roadway. Shape and compact the roadway surface to final grade as specified in Section 203. Keep traffic off of the treated surface for 2 hours after application, or as directed.

624-4.01 METHOD OF MEASUREMENT. See Section 109 and as follows:

Bulk. By weighing in dry form. Packaged. By manufacturer’s packed net weight.

624-5.01 BASIS OF PA YMENT. Payment will be made under:

PAY ITEM Item Number Item Description Unit 624.0001.____ Calcium Chloride TON 344 ALASKA 2020 SECTION 625 PIPE HAND RAIL

625-1.01 DESCRIPTION. Furnish and place pipe handrail with galvanized steel pipe members,

concrete bases, and other required materials in conformance with the Plans.

625-2.01 MATERIALS. Use materials that conform to the f ollowing;

Concrete Section 550, Class W Pipe ASTM A53, Galvanized, Schedule 40

625-3.01 CONSTRUCTIO N REQUIREMENTS. Set posts plumb in concrete base. Weld

galvanized steel pipe members at rail -to-post connections and intermediate rail connections, as shown on the Plans. Erect railing smoothly and continuously so that it is parallel to the sidewalk grade. Repair all welds and damaged galvanizing to conform to AASHTO M 36.

625-4.01 METHOD OF M EASUREMENT. See Section 109.

625-5.01 BASIS OF PA YMENT. Payment w ill be made under:

PAY ITEM Item Number Item Description Unit 625.0001.____ Pipe Hand Rail LF