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

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resistance as shown on the plans,computed in conformance with the provisions in Section 49-1.08, "Pile Driving Acceptance Criteria," additional aids shall be used to obtain the specified penetration. These aids may include the use of water jets or drilling,where permitted,or the use of a larger hammer employing a heavy ram striking with a low velocity. Section 49-1.08, "Bearing Value and Penetration,"of the Standard Specifications is amended to read: 49-1.08 PILE DRIVING ACCEPTANCE CRITERIA • Except for piles to be load tested, driven piles shall be driven to a value of not less than the nominal resistance shown on the plans unless otherwise specified in the special provisions or permitted in writing by the Engineer. In addition, when a pile tip elevation is specified, driven piles shall penetrate at least to the specified tip elevation, unless otherwise permitted in writing by the Engineer. Piles to be load tested shall be driven to the specified tip elevation. • When the pile nominal resistance is omitted from the plans or the special provisions,timber piles shall be driven to a nominal resistance of 800 kN,and steel and concrete piles shall be driven to a nominal resistance of 1250 kN. • The nominal resistance for driven piles shall be determined from the following formula in which"Ru"is the nominal resistance in kilonewtons, "Er" is the manufacturer's rating for joules of energy developed by the hammer at the observed field drop height, and "N" is the number of hammer blows in the last 300 millimeters. (maximum value to be used for N is 100): Ru=(7 *(E'r)"2*log10(0.83 *N))-550 The first paragraph in Section 49-2.03,"Requirements,"of the Standard Specifications is amended to read: • When preservative treatment of timber piles is required by the plans or specified in the special provisions, the treatment shall conform to the provisions in Section 58, "Preservative Treatment of Lumber, Timber and Piling," and the applicable AWPA Use Category. The first paragraph in Section 49-2.04,"Treatment of Pile Heads,"of the Standard Specifications is amended to read: A. An application of wood preservative conforming to the provisions in Section 58-1.04, "Wood Preservative for Manual Treatment," shall first be applied to the head of the pile and a protective cap shall then be built up by applying alternate layers of loosely woven fabric and hot asphalt or tar similar to membrane waterproofing,using 3 layers of asphalt or tar and 2 layers of fabric. The fabric shall measure at least 150 mm more in each direction than the diameter of the pile and shall be turned down over the pile and the edges secured by binding with 2 turns of No. 10 galvanized wire. The fabric shall be wired in advance of the application of the final layer of asphalt or tar,which shall extend down over the wiring. B. The sawed surface shall be covered with 3 applications of a hot mixture of 60 percent creosote and 40 percent roofing pitch, or thoroughly brushcoated with 3 applications of hot creosote and covered with hot roofing pitch. A covering of 3.50-mm nominal thickness galvanized steel sheet shall be placed over the coating and bent down over the sides of each pile to shed water. Section 49-3.01, "Description,"of the Standard Specifications is amended by deleting the fifth paragraph. The sixth and seventh paragraphs in Section 49-3.01,"Description,"of the Standard Specifications are amended to read: • Except for precast prestressed concrete piles in a corrosive environment, lifting anchors used in precast prestressed concrete piles shall be removed, and the holes filled in conformance with the provisions in Section 51-1.18A, "Ordinary Surface Finish." • Lifting anchors used in precast prestressed concrete piles in a corrosive environment shall be removed to a depth of at least 25 mm below the surface of the concrete, and the resulting hole shall be filled with epoxy adhesive before the piles are delivered to the job site. The epoxy adhesive shall conform to the provisions in Sections 95-1, "General," and 95-2.01, "Binder(Adhesive),Epoxy Resin Base(State Specification 8040-03)." The first and second paragraphs in Section 494.01, "Description,"of the Standard Specifications are amended to read: • Cast-in-place concrete piles shall consist of one of the following: A. Steel shells driven permanently to the required nominal resistance and penetration and filled with concrete. B. Steel casings installed permanently to the required penetration and filled with concrete. Contract No. 10-0M7104 23