AASHTO-HB-17-DIVISION-II-SEC-17-2002.pdf
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1、Section 17 PRESERVATIVE TREATMENT OF WOOD 17.1 GENERAL This work shall consist of treating wood, including lumber, timber, piles and poles, with designated preserv- atives in accordance with these Specifications. It shall in- clude furnishing all materials, preparing, treating, and performing all wo
2、rk to complete treating the wood prod- ucts required for the project. The type of preservative treatment required shall be as specified in the special provisions or as noted on the plans. When a specific type of preservative is not called for, the kind of preservative to be used shall be adopted for
3、 its suitability to the conditions of exposure to which it will be subjected and shall be subject to approval of the Engineer. The handling and care of treated woods shall conform to the requirements of Sections 4, “Driven Foundation Piles,” and 16, “Timber Structures.” 17.2 MATERIALS 17.2.1 Wood Pi
4、ling shall conform to the requirements of Section 4, “Driven Foundation Piles.” Timber and lumber shall con- form to the requirements of Section 16, “Timber Struc- tures.” 17.2.2 Preservatives and Treatments Timber preservatives and treatment methods shall con- form to AASHTO M 133. The type of pres
5、ervative fur- nished shall be in accordance with that specified or as noted on the plans. It should be noted that AASHTO M 133 designates the preservatives and retentions recom- mended for Coastal Waters and in marine structures and further that timber for use in “ground or water contact” has requir
6、ements that differ from timbers for use “not in ground or water contact.” In some instances there is a range of retentions offered which provides for different degrees of exposure based on climate or degree of insect infestation. Unless the higher retentions are specified, not less than the minimum
7、retention is required. Unless otherwise specified in the Special Provisions or shown on the design drawings, timber railings and posts and timber that are to be painted shall be treated with pentachlorophenol with a Type C solvent or with a water-borne preservative of either Type CCA or ACZA. 17.2.3
8、 Coal-tar Roofing Cement For purposes of these specifications pitch, coal-tar pitch, coal-tar roofing pitch, or coal-tar roofing compound shall mean coal-tar roofing cement wherever the terms are used. Coal-tar roofing cement is a residue of the manu- facturing of coke and creosote from bituminous c
9、oal. It shall be a thick, heavy-bodied, and paste-like material. When called for, it can be mixed with creosote. It may or may not contain fibrous material. 17.3 IDENTIFICATION AND INSPECTION 17.3.1 Branding and Job Site Inspection Each piece of treated timber shall bear a legible brand, mark, or ta
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- AASHTO HB 17 DIVISION II SEC 2002
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