Permits & Development - Encroachment(EP)/Driveway(DW) Permits - 2007_EP-07-301 thru EP-07-400_ - EP-07-352

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the Pile"shall not be used. The pile shall sustain the first tension test load applied which is equal to the nominal resistance in tension,as shown on the plans,with no more than 13 mm total vertical movement at the top of the pile measured relative to the top of the pile prior to the start of tension load testing. The ninth paragraph in Section 49-1.03,"Determination of Length,"of the Standard Specifications is amended to read: • For driven piling,the Contractor shall furnish piling of sufficient length to obtain the specified tip elevation shown on the plans or specified in the special provisions. For cast-in-drilled-hole concrete piling, the Contractor shall construct piling of such length to develop the nominal resistance in compression and to obtain the specified rip elevation shown on the plans or specified in the special provisions. The tenth paragraph in Section 49-1.03,"Determination of Length,"of the Standard Specifications is deleted. The fourth paragraph in Section 49-1.04,"Load Test Piles,"of the Standard Specifications is amended to read: • Load test piles and anchor piles which are not to be incorporated in the completed structure shall be removed in conformance with the provisions in Section 15-4.02, "Removal Methods," and the remaining holes shall be backfilled with earth or other suitable material approved by the Engineer. The fifth paragraph in Section 49-1.04,"Load Test Piles,"of the Standard Specifications is amended to read: • Load test anchorages in piles used as anchor piles shall conform to the following requirements: A. High strength threaded steel rods shall conform to the provisions for bars in Section 50-1.05, "Prestressing Steel," except Type II bars shall be used. B. High strength steel plates shall conform to the requirements in ASTM Designation: A 709/A 709M,Grade 345. C. Anchor nuts shall conform to the provisions in the second paragraph in Section 50-1.06, "Anchorages and Distribution." The sixth paragraph in Section 49-1.04,"Load Test Piles,"of the Standard Specifications is amended to read: • The Contractor may use additional cementitious material in the concrete for the load test and anchor piles. The first paragraph in Section 49-1.05,"Driving Equipment,"of the Standard Specifications is amended to read: • Driven piles shall be installed with impact hammers that are approved in writing by the Engineer. Impact hammers shall be steam, hydraulic, air or diesel hammers. Impact hammers shall develop sufficient energy to drive the piles at a penetration rate of not less than 3 mm per blow at the specified nominal resistance. The seventh paragraph in Section 49-1.05,"Driving Equipment," of the Standard Specifications is amended to read: • When necessary to obtain the specified penetration and when authorized by the Engineer,the Contractor may supply and operate one or more water jets and pumps,or furnish the necessary drilling apparatus and drill holes not greater than the least dimension of the pile to the proper depth and drive the piles therein. Jets shall not be used at locations where the stability of embankments or other improvements would be endangered. In addition, for steel piles, steel shells, or steel casings,when necessary to obtain the specified penetration or to prevent damage to the pile during installation,the Contractor shall provide special driving tips or heavier pile sections or take other measures as approved by the Engineer. • The use of followers or underwater hammers for driving piles will be permitted if authorized in writing by the Engineer. When a follower or underwater hammer is used,its efficiency shall be verified by furnishing the first pile in each bent or footing sufficiently long and driving the pile without the use of a follower or underwater hammer. The second paragraph in Section 49-1.07,"Driving,"of the Standard Specifications is amended to read: • Timber piles shall be fresh-headed and square and when permitted by the Engineer, the heads of the piles may be protected by means of heavy steel or wrought iron rings. During driving operations timber piling shall be restrained from lateral movement at intervals not to exceed 6 m over the length between the driving head and the ground surface. During driving operations, the timber pile shall be kept moving by continuous operation of the hammer. When the blow count exceeds either 2 times the blow count required in 300 mm, or 3 times the blow count required in 75 mm for the nominal Contract No. 10-OM7104 22