642Steps

642.01 Description This work shall consist of the constructio n of wooden steps,

precast concrete steps or cast-in-place concrete steps in accordance with these specifications and in reasonably close conformity with dimensions and designs shown on the plans.

642.02 Materials Materials for the steps shall meet the requi rements as specified in

the following Sections of Division 700 - Materials: Exterior Ready Mixed Paint 708.01 T i m b e r P r e s e r v a t i v e 708.05 Precast Concrete Units 712.06 6-120 Wood shall be well-seasoned spruce or pine, Number 1 dimension lumber. Nails and hardware shall be galvanized. Precast concrete steps shall conform to the specifications of precast units except as modified herein and shall be of the dimensions detailed on the plans or as otherwise approved. Exposed surfaces shall have a rubbed finish as specified in Section 502.14-d-2. Cast-in-place concrete steps, shall conform to the requirement s of Section 502 - Structural Concrete, Class A.

642.03 Wooden Steps Wooden steps shall be fabricated and fast ened in accordance

with standard commercial building practices. After members have been cut to size, the ends shall be soaked in an approved timber preservative. Before assembling the steps, all contact surfaces shall be painted 2 coats of paint, color to be designated. The first coat of paint shall be thinned.

642.04 Precast Concrete Steps Precast concrete steps shall be placed on a

compacted gravel bed with horizontal joints level and vertical joints plumb. The foundation shall be prepared in advance of setting the steps by grading and compacting the aggregate subbase to the proper elevation. The steps shall be set with a uniform tread width to match the finish grade of the slope. All remaining excavated areas surrounding the steps shall be filled to the required grade with approved materials and thoroughly tamped.

642.05 Cast-in-place Concrete Steps Cast-in-place concrete st eps shall conform to

the applicable requirements of Section 502 - Structural Concrete.

642.06 Method of Measurement Wooden steps and precast Portlan d cement

concrete steps will be measured by each unit, complete in place and accepted. Cast-in-place concrete steps will be measured for payment by t he cubic yard in place.

642.07 Basis of Payment The accepted wooden steps will be pai d for at the contract

unit price each, complete and accepted in place which price shall be full compensation for furnishing all materials, labor and other incidentals necessary to complete the work. The accepted quantity of precast concrete steps will be paid f or at the contract unit price each, complete in place, which price shall be full compensation for furnishing and placing all materials including reinforcing steel. Excavation and backfill will be measured and paid for as provi ded in Section 206 - Structural Excavation. 6-121 The accepted quantity for cast-in-place concrete steps will be paid for at the unit contract price per cubic yard complete in place which price shall be full compensation for furnishing and placing all materials including reinforcing steel. Payment will be made under: P a y I t e m P a y U n i t

642.12 Wooden Steps Each

642.15 Precast Concrete Steps Each

642.17 Cast-in-place Concrete Steps C u b i c Y a r d