2400 33RD ST CONTRACT AGREEMENT 2016-01-01 MF Import

ATTACHMENT A TO SECTION 01900 REVISIONS TO THE STANDARD PLANS AND SPECIFICATIONS CEMENT CONCRETE SIDEWALKS Materials Section 8-14.2 is supplemented wiih the following: Slump oi the concreta mix shalf not exceed 3-1/2 inches. Construction Requirements Excavati�n Section 8-14.3(1) is supplemented with the follawing: It is expected there will be sufficient suitable native material excavated trom various portions ot the improvement to fill low areas in the sidewalk subgrade and plan!ing strip area when needed and no further payment will be allowed for till material. Where there is insutficient suitable native material on the projec� si�e, �he Contractor shall turnish, place and compact gravel borrow meeting the requirements of Section 9-03.14 oi these Specifications. Forms Section 8-14.3(2) is supplemented with the tallowing: Before the forms are set, the subgrade shall be graded to two inches below established grade lo accommodate two inches oi crushed sur(acing top course. If ihe drawing calls for sidewalk drains or the Resident Engineer direcis sidewalk diains to be installed, they shall be installed prior to ihe forms being placed. Placing and Finishing Concrete Section 8-14.3(3) is supplemented with the following: Dummy joints shall be formed by first cutting a groove in ihe concrete with a tee bar of a depth equal to, but not greater than the joint filler material, and tnen working the premolded joint iiller into the groove. Premolded joint (iiter tor boih through and dunimy joints shall be positioned in true alignment at right angles to the line of ihe sidewalk and ba normal to and flush with the suriace. Aiter the concrete has been thoroughly compacted and leveled, it shall be floa.ted with wood iloats and finished at the proper time with a metal float. Joints shall be edged w?ih a 1/4 inch radius edger and the sidewalk edges shall be tooled with a 1/2 inch radius edger. After brush finish, the edges o( the sidewalk and all joints shall be lightly edged again with an edc�ing tool lo give it a iinished appearance. Scoring Scoring patterns shall be appiied to the sidewalks as detailed in �he Plans Curing Sectio� 8-14.3(4) is supplemented with the following: The Coniractor shall h�ve readily available sufiicient protective covering, such as waterproof paper or plastic mem6rane, to cover the pour o( an entire day in the event o( rain or other unsuitable weather. The �idewalk shall be protected against damage or defacement o9 any kind until it has been accepted by ihe Resident Engineer. Sidewalk that is not acceptable because of damage or defacement, shall be removed and replaced by the Contractor. Capital Projecis Commuter Rail Attachment A to Section 01900 - 29 IFB No. RTA/CP 21-06 � Eve:ett Station Phase 2REVISIONS TO THE STANDARD PLANS AND SPECIFICATIONSAddendum No.4