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- 57-2.02D Payment Not Used 57-2.03 TIMBER CATWALK 57-2.03A General
- 57-2.03B(1) General Reserved 57-2.03B(2) Timber Planks
- 57-2.04 ABUTMENT LUMBER BLOCKING
- 57-3.01C(2) Shop Drawings
- 57-3.01D Quality Assurance
- 57-3.01D(3) Department Acceptance
- 57-3.01D(3)(b)(ii) Exterior Void Test
- 57-3.01D(3)(b)(iii) Interior Void Test
57-2.02 TIMBER LAGGING57-2.02A GeneralSection 57-2.02 includes specifications for installing timber lagging. 57-2.02B MaterialsTimber members must be (1) preservative-treated Douglas fir and (2) full sawn to the dimensions shown. Chromated copper arsenate must not be used for preservative treatment. 57-2.02C ConstructionIf no concrete facing is shown: 1. Install lagging members 4 inches thick or less with a 3/8-inch gap between members 2. Install lagging members greater than 4 inches thick with a 1/2-inch gap between members
57-2.02D PaymentNot Used 57-2.03 TIMBER CATWALK57-2.03A GeneralSection 57-2.03 includes specifications for constructing timber catwalks. A timber catwalk consists of a walkway of two 3- by 12-inch planks bolted to steel supports and a cable handrail, if shown. 57-2.03B Materials57-2.03B(1) GeneralReserved 57-2.03B(2) Timber PlanksThe timber planks must be untreated Douglas fir Dense no. 1, rough sawn on top, optional surfaced on bottom. 57-2.03B(3) Cable HandrailThe cable for the cable handrail must be wire rope with a minimum diameter of 1/2 inch and a minimum breaking strength of 7,500 lb. The wire rope must be furnished with Class A weight zinc-coated wire under ASTM A603. The turnbuckles, U-bolts, and thimbles must be commercial quality. The turnbuckles must be steel pipe type or drop forged steel and must have jaw or eye ends. The turnbuckles and U-bolts must have a minimum breaking strength of 7,500 lb. The cable clamps and other required fittings must be commercial-quality steel, malleable iron, or wrought iron. Galvanize hardware, turnbuckles, U-bolts, cable clamps, and other fittings under section 75-1.02B. 57-2.03C ConstructionTension the handrail cables to provide taut railings between supports. Steel surfaces to be covered by timber must be painted the full number of applications specified before placing timber. Painting of timber planks is not required. 57-2.03D PaymentNot Used 57-2.04 ABUTMENT LUMBER BLOCKINGReserved 57-2.05 TIMBER RETAINING WALLSReserved 57-2.06–57-2.10 RESERVED57-3 PLASTIC LUMBER STRUCTURES 57-3.01 GENERAL57-3.01A SummarySection 57-3 includes specifications for constructing plastic lumber structures. 57-3.01B Definitionspostconsumer waste: Finished material, not including manufacturing waste, that has completed its life cycle as a consumer item and would have been disposed of as a solid waste. production lot of plastic lumber: Quantity of 100 cu yd or less that is ready for shipment to the job site and is of the same type, manufactured by the same method, and made of the same material. recycled product: Material, good, or supply, of which at least 50 percent of its total mass consists of secondary waste and at least 10 percent of its total mass consists of postconsumer waste. secondary waste: Finished products or fragments of finished products of a manufacturing process, including postconsumer waste but not including excess virgin resources of the manufacturing process. 57-3.01C Submittals57-3.01C(1) GeneralSubmit the following product data: 1. Manufacturer's material test reports 2. Manufacturer's performance data 3. SDSs
4. 2 copies of the printed literature for the product Submit a certificate of compliance for each shipment of plastic lumber. The certificate must be accompanied by a laboratory test report. Submit test samples for void testing. Submit results of stiffness tests.
Shop drawings must show: 1. Details for component layout and connections 2. Sequence of shop and field assembly 3. Installation procedures
57-3.01D(1) GeneralReserved 57-3.01D(2) Quality Control57-3.01D(2)(a) GeneralStart a new production lot if any production parameter changes before the maximum production lot size is reached. 57-3.01D(2)(b) Stiffness TestBefore shipment to the job site, perform stiffness tests for the plastic lumber in the presence of the Engineer at an authorized laboratory. Notify the Engineer at least 15 days before conducting the tests. The Engineer randomly selects 2 test samples from each production lot for stiffness testing. Determine the stiffness and the yield stress in bending under ASTM D790, except the test samples must have a minimum length of 13 feet and tests must be performed on a 12-foot span length at a crosshead motion of 0.25 inch per minute. Calculate the stiffness using the secant modulus at the flexural strain of 0.010 inch per inch. If the stiffness or the yield stress in bending of either of the 2 test samples does not comply with section 57-3.02A, perform a retest on 2 additional test samples selected by the Engineer. If the stiffness or the yield stress in bending of either of the 2 additional test samples does not comply with section 57-3.02A in the retest, the entire production lot of plastic lumber represented by the test samples is rejected. 57-3.01D(3) Department Acceptance57-3.01D(3)(a) GeneralThe Engineer selects 2 test samples of each size from each production lot of plastic lumber delivered to the job site for void testing. 57-3.01D(3)(b) Void Testing57-3.01D(3)(b)(i) GeneralBefore use in the work, the plastic lumber must be tested for both exterior and interior voids. Allow 15 days for void testing. 57-3.01D(3)(b)(ii) Exterior Void TestThe Engineer examines the test samples for exterior voids. If the exterior voids of either of the 2 test samples do not comply with section 57-3.02A, the Engineer selects 2 additional test samples and performs a retest. If the exterior voids of either of the 2 additional test samples do not comply with section 57-3.02A in the retest, the entire production lot of plastic lumber represented by the test samples is rejected. 57-3.01D(3)(b)(iii) Interior Void TestAfter acceptance under the exterior void test, cut the test samples into 1-foot-long segments. The Engineer examines the cut sections for interior voids. If the interior voids of a cut section of either of the 2 test samples do not comply with section 57-3.02A, the Engineer selects 2 additional test samples and performs a retest. If the interior voids of a cut section of either of the 2 additional test samples do not comply with section 57-3.02A in the retest, the entire production lot of plastic lumber represented by the test samples is rejected. Directory: esc esc -> Biblical Eschatology Presentation by: D. Paul Beck May 4, 2016 Ground Rules esc -> Mikael Håfstrӧm Screenplay by Miles Chapman and Arnell Jesko esc -> Escort affinity Program for Audi Club Members esc -> Preliminary entry form pistol esc -> Application form esc -> Request from Asian and Pacific Training Centre for Information and esc -> Constitution of the engineering student council university of maryland esc -> Subdisciplines of Earth Science Geology; study of the earth Download 6.74 Mb. Share with your friends:
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