Published by department of transportation
-3.03–56-3.04 RESERVED 56-3.05 HIGH MAST LIGHTING ASSEMBLY POLES
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- 57-1.01A Summary Section 57-1 includes general specifications for constructing wood and plastic lumber structures. 57-1.01B Definitions
- 57-1.01C Submittals Reserved 57-1.01D Quality Assurance
- 57-1.02B Structural Metal
- 57-1.03 CONSTRUCTION Not Used 57-1.04 PAYMENT
- 57-2.01A(1) Summary Section 57-2 includes specifications for constructing wood structures. 57-2.01A(2) Definitions
- 57-2.01A(4) Quality Assurance
- 57-2.01B(2) Structural Timber and Lumber
- 57-2.01B(3) Preservative Treatment
- 57-2.01C(1) General Reserved 57-2.01C(2) Framing
- 57-2.01C(3) Treated Timber
- 57-2.01C(3)(b) Manual Treatment
56-3.03–56-3.04 RESERVED56-3.05 HIGH MAST LIGHTING ASSEMBLY POLESReserved 56-3.06 WOOD POLES56-3.06A GeneralSection 56-3.06 includes specifications for fabricating and installing wood poles. 56-3.06B MaterialsEach wood pole must: 1. Be class 5 or larger as specified in ANSI O 5.1 2. Have not more than 180-degree twist in grain over the full length 3. Have a sweep of not more than 4 inches 4. Have a beveled top 5. Be placed in the ground at least 6 feet 6. Unless otherwise specified, have a length of: 6.1. 25 feet for a service pole 6.2. 35 feet for other poles
56-3.06C ConstructionAfter each pole is set in ground, backfill the space around the pole with selected earth or sand, free of rocks and other deleterious material, placed in 4-inch-thick layers. Moisten each layer and thoroughly compact. Manufacture the mast arm from standard pipe, free from burrs. Each mast arm must have an insulated wire inlet and wood pole mounting brackets for the mast arm and tie-rod cross arm. Manufacture tie rod from structural steel and pipe. Mount the mast arm for luminaires to provide a 34-foot mounting height for a 200 W high-pressure sodium luminaire and a 40-foot mounting height for a 310 W high-pressure sodium luminaire. Traffic signals and flashing beacons on the mast arm must provide a minimum vertical clearance of 17 feet from bottom of equipment to pavement.
56-3.06D PaymentNot Used 56-4–56-10 RESERVED 57 WOOD AND PLASTIC LUMBER STRUCTURES 57-1 GENERAL 57-1.01 GENERAL57-1.01A SummarySection 57-1 includes general specifications for constructing wood and plastic lumber structures. 57-1.01B Definitionshardware: Bolts with necessary nuts and washers, timber connectors, drift pins, dowels, nails, screws, spikes, wire rope for wrapping, lag screws, and other metal fastenings. structural metal: Structural shapes, eyebars, castings, rods with necessary nuts and washers, metal shoes, and plates, but not including hardware. 57-1.01C SubmittalsReserved 57-1.01D Quality AssuranceReserved 57-1.02 MATERIALS57-1.02A GeneralDeliver, store, and handle timber and lumber as follows: 1. Store in piles at the job site unless it is to be placed in the structure immediately 2. Stack neatly on dunnage above ground so that it can be readily inspected 3. Store and handle such that injury and breakage are avoided 4. Protect from the sun to prevent warping
Hot-dip galvanize structural metal under section 75-1.02B. 57-1.02C HardwareHardware must comply with section 75. Except for malleable iron washers, hot-dip galvanize hardware under section 75-1.02B. Bolts and nuts must comply with ASTM A307. Machine bolt heads and nuts must be regular square series and threads must be coarse thread series, Class 2 tolerance, all complying with ANSI Standard. Washers must be cast iron ogee, malleable iron, plate, or cut washers. Nails must be common wire nails. Wire rope must be commercial-quality galvanized steel wire rope. Splices and end connections of wire rope must be made with metal clips.
57-1.03 CONSTRUCTIONNot Used 57-1.04 PAYMENTFor a bid item with a MFBM measurement unit, the payment quantity is the volume determined from (1) nominal widths and thicknesses and (2) lengths shown. 57-2 WOOD STRUCTURES 57-2.01 GENERAL57-2.01A General57-2.01A(1) SummarySection 57-2 includes specifications for constructing wood structures. 57-2.01A(2) DefinitionsReserved 57-2.01A(3) SubmittalsSubmit a certificate of compliance for timber and lumber stating the species of the material to be shipped and including a certified grading report. If timber is treated, include a certified treating report. Submit a certificate of compliance for glued laminated timbers and glued laminated decking. 57-2.01A(4) Quality AssuranceTreated and untreated timber and lumber must comply with the grading specifications when delivered to the job site. 57-2.01B Materials57-2.01B(1) GeneralGrease used to fill bolt holes must be recommended by the manufacturer for corrosion protection and must not melt or run at a temperature of 150 degrees F. 57-2.01B(2) Structural Timber and LumberStructural timber and lumber must be one of the species shown in the following table:
Structural timber and lumber must be inspected and grade marked under the rules and specifications shown in the following table:
Stress-graded lumber must comply with the following: 1. Wood must be sound and free from decay. 2. Green timber must be protected from uneven seasoning during transit. 3. Douglas fir must be end coated with a protective coating during manufacturing to retard checking. For all stress grades, the sizes described for timber and lumber are nominal sizes under American Softwood Lumber Standard, PS 20, published by NIST. Plywood must be 3/4-inch-thick Grade BC Douglas fir plywood manufactured with adhesives for wet use and must be preservative treated. Each glued laminated timber or decking unit must bear the American Institute of Timber Construction quality mark. Glued laminated timbers must be architectural grade with glue for wet use and saw-textured exposed surfaces. Glued laminated timbers must comply with ANSI/AITC A190.1 and AITC 117, published by the American Institute of Timber Construction. Glued laminated decking units must be: 1. Douglas fir, white pine, or Hem-Fir 2. Kiln-dried solid stock lumber 3. Factory laminated using adhesive for wet use 4. At least 3 plies thick, with tongue and groove edges 5. At least 5.5 inches in width and thickness
Preservatives, treatment, and treatment results must comply with AWPA Standards U1 and T1 and the specified AWPA Use Category. If a Use Category is not specified, the preservative treatment must comply with AWPA U1, Use Category UC4B. The treating plant must imprint legible symbols in the ends of all treated timber and lumber. The symbols must indicate the name of the treating company and the type and year of treatment under AWPA Standards M1 and M6. Where timber is specified to be kiln dried before treatment, the moisture content after drying and immediately before treating must not exceed 25 percent. Measure the moisture content under ASTM D4444 at the midpoint of the piece in the outer 1 inch. Use an authorized type of moisture meter. Timber and lumber treated with waterborne preservatives must be dried after treatment and have a moisture content of no more than 25 percent when shipped to the job site. For treated wood that is to be painted, use a waterborne wood preservative. Manually applied wood preservative must be creosote or copper naphthenate complying with AWPA Standard M4.
57-2.01C Construction57-2.01C(1) GeneralReserved 57-2.01C(2) FramingTimber and lumber must be accurately cut and framed to a close fit and must have even bearing over the entire contact surface. Do not use shimming in making joints. Bore fastener holes as shown in the following table:
Fit each bolt 5/8 inch or less in diameter with a cut washer. Fit each bolt or lag screw over 5/8 inch in diameter with a cast or malleable iron washer. Framed bents must comply with the following: 1. Mud sills must be firmly and evenly bedded in solid material. 2. Sills must have full, even bearing on the pedestals, mud sills, or piles. 3. Posts must be framed true and must have full bearing on pedestals, sills, and caps.
For bridge deck stringers, place the better edge down. After placing stringers, the tops of the stringers must not vary from a plane more than will allow bearing of the floor on all the stringers. Wheel guards and railings must be accurately framed and aligned.
57-2.01C(3)(a) GeneralSection 57-2.01C(3) applies to treated timber. Preservative-treated timber must be Douglas fir or Hem-Fir. Chromated copper arsenate must not be used for preservative treatment. Do not remove bolts and hardware using flame-type or air-arc cutting equipment. Predrill for bridge spikes within 1 foot of the ends of existing timbers and new planking. Predrill elsewhere if necessary to avoid splitting the timber or bending the spikes. If authorized, you may relocate holes for new bolts and drift pins to avoid conflicts with existing hardware embedded in existing wood. For lumber treated with ammoniacal copper arsenate, ammoniacal copper zinc arsenate, ammoniacal copper quat, or copper azole: 1. Fill bolt holes with grease before inserting bolts 2. Use nylon spacers, polyethylene tape, or other authorized corrosion-resistant barrier on surfaces of hardware that will be in contact with treated wood
If manually applying preservative, use suitable brushes for exposed surfaces, use swabs for holes, or use other means that result in adequate coverage. If treated timber is framed, cut, or bored after treatment, thoroughly swab each cut, dap, or hole with 2 applications of the same preservative specified for the timber treatment or of copper naphthenate. Manually treat the following items with 2 applications of wood preservative: 1. Portions of rail posts to be embedded in earth or concrete 2. Faces of timber bulkheads to be in contact with earth except those of treated Douglas fir 57-2.01C(3)(c) HandlingHandle and care for pressure-treated wood materials under AWPA Standard M4. Handle treated timber with rope slings. Do not use cant hooks, peaveys, or other sharp instruments to handle treated timber. 57-2.01C(4) PaintingFor painted timber and lumber, comply with section 78-4.02. Paint the following items with 1 application of latex-base wood primer and 2 applications of white exterior latex-based paint: 1. Rails 2. Portions of rail posts not embedded in earth or concrete 3. Wheel guards or timber curbs except the bottom faces over an earth surface 4. Exposed faces of posts 57-2.01D PaymentNot Used 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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