1072 Property Requirement Dimensions ASTM A499 Chemical composition ASTM A1 Yield strength Minimum 60,000 psi Tensile strength Minimum 90,000 psi Elastic modulus value 910.14(a)3 Posts shall be of uniform flanged channel or U section such that the area of contact between the post and the sign is symmetrical about the vertical axis of both sign and post. The back of each post shall be formed in a manner to ensure a solid bearing surface over the entire length of the post when mounted back to back. The bearing surface on the back of the post shall be flat. The length shall be as specified with a 860 tolerance of ±1 in. Sign posts shall be punched with 58 holes which shall be 3/8 in. in diameter located on the center-line and spaced on 1 in. centers beginning 1 in. from the top. The remainder of the post shall be punched with 3/8 in. holes on 1 in. or 2 in. centers. The finished posts shall be machine straightened and have a smooth uniform finish free from cracks, flaws, injurious seams, laps, blisters, and edges which are ragged, sharp, and imperfect, or other defects affecting their strength, durability, or appearance. The maximum variation in straightness shall be no more than 1/4 in. in any 5 ft of length or exceed in inches 1/4 times the number of feet of length divided 870 by 5. Bolt holes of the diameter specified shall be accurately spaced vertically and centered horizontally so that holes will register for back to back application. All holes and sheared ends shall be commercially free from burrs. The steel sign posts shall be galvanized in accordance with ASTM A123. Galvanizing shall be the final process after all fabrication and punching has been completed. Posts saw cut afte r galvanizing shall have th e cut surface treated with a zinc-based solder in rod form which complies with ASTM A780. The cut surface shall not be treated until the fuse plate is installed and all bolts are tightened. The top of the 880 fuse plate shall be 1 in. below the bottom of the sign. Posts saw cut before galvanizing shall have temporary fasteners provided with sufficient strength to prevent warping or deforming of the post during the galvanization process. The surface under the temporary fasteners shall be treated with an approved zinc solder meeting the above mentioned specifications. The surface shall be treated before the fuse plate is installed. The break-away stubs shall be galvanized a minimum of 8 in. below the top of the concrete foundation. Steel posts shall be wired or strapped securely in bundles of not more than 890 2,000 lb. They shall be nested in rows with the edges intermeshed to form a rectangular bundle and shall be fastened in such a manner that they do not slip or rub against each other and cause damage to the finish. Care shall be taken during shipment to prevent 910.14 1073 the bundles from rubbing against each other and causing damage. Excessive damage to the finish during shipment will be cause for rejection of the damaged posts.
2.Deflection Test Requirements Posts will be tested as a simple beam with the flange in compression on non-restricting supports 24 in. apart. Test specimens shall be 28 in. ±1/4 in. long. A load of 1,500, 3,500, or 4,600 lb, depending on the type of post, shall be applied at the 900 center of the span with a mandrel of not less than 1 in. in diameter. Application of the load shall be at a speed not to exceed 0.03 in. per minute. Deflection of the post upon application of the total load shall not exceed 0.16 in. The load shall then be removed. Deflection of the post 1 minute after removal of the load shall not exceed 0.01 in. 3. Type of Posts Posts shall conform to the following table and to deflection tests required in 910.14(a)2: Type Minimum Elastic Section Modulus Loading A .200 1,500 lb B .400 3,500 lb C .560 4,600 lb Abb* .670 ** Bbb* 1.190 ** * Back to Back ** Back to Back post shall be tested singly for deflection prior to assembly. Note: The elastic section modulus values shall be included in the T ype B certification.
b.Wide Flange Posts Structural steel members for the support of signs shall be in accordance with ASTM A36 and ASTM A709, grade 36. These members shall be galvanized in accordance with ASTM A123. Base plates an d stiffeners shall be in accordance with the requirements of ASTM A709, grade 36. Fuse and hinge plates shall be in accordance with the requirements of ASTM A 36 and shall be galvanized in accordance with ASTM A123. All bolts and nuts shall be high strength heavy hex and be in accordance with ASTM F3125, grade A325, and ASTM A563. Washers shall be in accordance with ASTM F436. Direct Tens ion Indicator hardware shall be in accordance with ASTM F959. 920 All holes shall be drilled. All cutting shall preferably be saw cuts however flame cuts as specified in 711.13 may be allowed. Metal projecting beyond the plane of the plate face will not be allowed. (c) Structural Steel Posts Steel members for the support of signs shall be standard shapes as specified and shall be in accordance with 910.02(a). Th ese members shall be galvanized in 910.14 1074 accordance with ASTM A123. A Type C certif ication in accordance with 916 shall be provided for the structural steel posts. 930
d.Structural Aluminum Posts These posts shall be standard shapes as specified and shall be aluminum in accordance with ASTM B221 alloy 6061-T6. A Type C certification in accordance with 916 shall be provided for the structural aluminum posts.
e.Square Steel Posts A Type B certification in accordance with 916 shall be provided for the square steel posts. The limits of the following shall be shown on the certification. 940
1.Steel Square steel posts shall be roll formed and in accordance with one of the following:
a.ASTM A1011, hot rolled carbon sheet steel in either 0.105 in. or 0.075 in. with a minimum yield strength of 60,000 psi. The ultimate tensile strength shall not exceed 79,800 psi or have an elongation measured over 2 in. greater than 20%.
b.ASTM A1008, cold rolled high strength steel, 0.075 in. with 950 a minimum yield strength of 60,000 psi. This shall apply to the 2 in. by 2 in. size posts only.
c.ASTM A653, cold rolled high strength steel, 0.075 in. with minimum yield strength of 60 ,000 psi. The ultimate tensile strength shall not exceed 79,800 psi or have an elongation measured over 2 in. greater than 20%. This requirement shall apply to the 2 in. by 2 in. size posts only. Yield strengths and chemical composition shall be determined from the three 960 latest test results performed by the steel manufacturer. These test results may not be determined on materials from which the delivered posts were made. However, the tests shall have been performed within 90 days of shipment. The certification shall include the range of test results and the section modulus value in accordance with 910.14(a)3.
2.Fabrication The posts shall be corner welded and s carfed as necessary to allow sections to telescope within each other. The finished po sts shall be machine straightened and have a smooth uniform finish free from cracks, flaws, injurious seams, laps, blisters, and edges which are ragged, sharp, and imperfect, or other defects affecting their strength, 970 durability, or appearance. The maximum variation in straightness shall be no more than 1/4 in. in any 5 ft of length. Cut holes or knockout holes of 7/16 in. diameter shall be spaced on 1 in. centers, on the centerlines of all four sides in true alignment, and 910.14 1075 opposite to each other for back to back app lications. All holes and sheared ends shall be free from burrs.
3.Protective Coating The protective coating shall be applied using one of the following: a. Before fabrication, both sides of the rolled sheet steel shall 980 be galvanized in accordance with ASTM A653, coating designation G90.
b.After fabrication, a triple coating system on the outside of the posts consisting of galvanizing with zinc which is in accordance with ASTM B6 we ighing 0.60 ±0.15 oz/sq ft followed by a chromatic conversion coating weighing 15 ±5 μg/sq in. and a clear organic exterior coating with a dry film thickness of 0.2 ±0.1 mil. The interior surface of the posts shall receive a double in-line application of a zinc rich 990 organic coating with a total dry film thickness of 1.2 ±0.6 mil. The dried zinc rich organic coating film shall contain a minimum of 77% total zinc. Samples from the posts which use these protective coatings shall be exposed to salt fog testing in accordance with ASTM B117 for a total of 500 h. The samples shall be examined at both 100 and 500 h of salt fog testing and rated for corrosion. At 100 h the corrosion rating shall be a minimum of 9 and at 500 h the corrosion rating shall be a minimum of 6 when determined in accordance with ASTM D1654. 1000
f.Portable Construction Sign Trailer The portable construction sign trailer, not including the signs and lights, shall weigh no more than 300 lb and shall not be fabricated with heavier than 3 by 3 in. angles, 2 1/2 in. pipe, or 3 by 2 in. rectangular tubing. The rim size of the wheels shall not exceed 12 in. Axle assemblies with di fferential housings shall not be used.
910.15 Delineator Posts Posts shall be in accordance with 910.14(a)1. 1010
Physical requirements for the finished delineator posts shall be: Width of flange face .................................................... 2 to 2 3/8 in. Width of back .............................................................. 3/4 to 7/8 in. Depth from face of flange to back ............................... 7/8 to 1 1/8 in. Length .......................................................................... 7.0 ft ±1 in. Weight ......................................................................... 1.0 to 1.5 lb/ft 910.15 1076 Delineator posts shall be punched with a minimum of twenty-four 1/4 in. holes on the centerline spaced on 1 in. centers beginning 1 in. from the top. 1020
910.16 Copper Flashing Copper flashing shall be soft copper and shall be in accordance with ASTM B370, except the minimum copper content shall be 99.5%. The weight per square foot will be determined by weighing individual samples. If the first sample is not in accordance
with the tolerances for 16 oz sheet, two additional samples shall be tested and both shall comply with the specified tolerances. The sample shall withstand being cold bent through an angle of 180° flat upon itself, without failure of the outside of the bent portion. A Type C certification in accordance with 916 shall be provided for copper flashing. 1030
910.17 Bronze or Copper Alloy Plates
Bronze or copper alloy to be used for self lubricating bearing plates shall conform to one of the following requirements based on the design unit loading set out on the plans: Design Unit Loading not over Shall Conform to ASTM
A.3,000 psi B22, Alloy C86300
B.2,500 psi B100, Alloy C51000
C.2,000 psi B22, Alloy C91100
D.1,000 psi B22, Alloy C90500* * Up to 2.5% lead allowed. The sliding surfaces of the plates shall be provided with cyli ndrical recesses with a depth necessary to provide proper containm ent of the lubricant. The recesses shall be arranged in a geometric pattern so that each successive row will overlap in the 1040 direction of motion. The total area of the recesses shall comprise no less than 25% and no more than 35% of the total area of the plate. The surface finish of bearing areas shall be in accordance with ANSI B46.1 #125. The lay of tool marks shall be in the dir ection of expansion or contraction of the structure. If the surface is ground, grinding knurls may be omni-directional. Flat bearing surfaces shall be flat to a tole rance of ±0.0005 in. Curved bearing surfaces shall be machined to a tolerance of ±0.0005 in. in each 1 in. of length perpendicular to the circular section. The radius of curved bearing surfaces shall have the following tolerances: 1050 Positive Tolerance Negative Tolerance Concave Surface 0.010 in. 0.000 in. Convex Surface 0.000 in. 0.010 in. The lubricant shall be of the solid type. It shall consist of graphite and metallic substances having lubricating properties with a lubricating binder. The lubricant shall be free of any material that causes abrasive or corrosive action on the metal surfaces. 910.16 1077 It shall withstand the atmosp heric elements. The lubricant shall be compressed into the recesses of the bearing plate by hydrauli c pressure to form a dense non-plastic lubricating insert. At the time of assembly in place, the steel surfaces which bear on the self- 1060 lubricating bearing plate shall be lubricated with additional lubricant furnished by the manufacturer. White lead, tallow, or other coating shall be removed before the application of the lubricant. The coefficient of friction between the self-lubricating plate and the steel plates in contact with them shall not exceed 0.10 when subjected to twice the designed loading. A Type C certification in accordance with 916 shall be provided for the bronze or copper alloy plates. 1070
910.18 Fence, Fittings, and Gates (a) Farm Field or Woven Wire Fence This fence shall be in accordance with ASTM A116. The wire shall be No. 9
gauge (3.8 mm). The design shall be 1047-6- 9. The coating shall be class 3. The method of securing the vertical stays to the horizontal wires may be either of those shown on the plans. Diagonal braces shall be in accordance with 910.18(b)3. A Type C certification in accordance with 916 shall be provided for the fence, 1080 fittings, and gates.
b.Steel Fabric Chain Link Fence This fence shall be in accordance with AS TM A392 for galvanized steel fabric or ASTM A491 for aluminum coated steel fabric. The height of the fabric shall be 48 in. unless otherwise specified. It shall be of No. 9 gauge (3.8 mm) wire woven in 2 in. mesh. The fabric shall be knuckled at the top and bottom selvages when the height is less than 72 in. Fabric of 72 in. in height or higher shall be knuckled at the top and shall have the twisted and barbed finish at the bottom. For galvanized fabric, coating shall be done after weaving and shall be cla ss II, average of two or more specimens no 1090 less than 2.0 oz/sq ft and no less than 1.8 oz/sq ft for any individual specimen. For aluminum coated fabric, coating shall be class II, 0.40 oz/sq ft minimum. The fabric shall be furnished with ties required for fastening it to the top and bottom tension wires. These fastenings may be of aluminum wire or strip of approved gauge and design, or of galvanized steel wire in accordance with the manufacturer’s standard design. If galvanized steel wire ties are furnished, the wire shall be no smaller than No. 12 gauge (2.7 mm). Sufficient ties shall be furnished to provide for attaching to the top and bottom tension wires each 24 in. Fittings necessary to make complete installation shall be pressed or rolled steel, forged steel, cast steel, or malleable iron. 1100 910.18 1078 Steel fabric chain link fence shall be as shown on the plans and as set out above. A Type C certification in accordance with 916 shall be provided for the steel fabric chain link fence. 1. Tension Wire Tension wire intended for use on the top or bottom of steel chain link fence or on the bottom of farm field fence, when specified, shall be spring coil or crimped steel wire with an initial diameter of 0.177 ±0 .005 in., a minimum breaking load of 1,950 1110 lb, and a coating of either zinc or aluminum. The minimum weight (mass) of coating shall be 0.80 oz/sq ft for galvanized wire and 0.40 oz/sq ft for aluminum coated steel wire. The weight of aluminum coating shall be determined in accordance with ASTM A428. A Type C certification in accordance with 916 shall be provided for the tension wire. 2. Stretcher Bars, Truss Rods, and Turnbuckles Stretcher bars shall be 3/16 by 3/4 in. flat bars. These bars, truss rods, turnbuckles, 1120 and necessary fittings shall be of good commercial quality steel, malleable iron, or wrought iron. They shall be galvanized in accordance with ASTM A153 after fabrication. The turnbuckles shall be made from drop forged malleable iron. They shall have a minimum take up of 4 in. The fittings may be pressed or rolled steel, forged steel, cast steel, or malleable iron.
3.Braces Braces shall be made of steel pipe with bolted steel couplings or connections. Steel pipe shall be in accordance with ASTM F1083. They shall be galvanized as set out therein. Fabrication or manipulation that causes minor damage to the galvanized 1130 coating shall be corrected by approved application of a high zinc dust-zinc oxide paint conforming to the requirements of Federal Specification TT-P-641 Type II or Military Specifications DOD-P-21035. When spray paints are used, two coats shall be applied. Damaged braces will be rejected. 4. Barbed Wire Barbed wire used at the top and bottom of farm field fence, or as otherwise specified, and in accordance with 603 shall be in accordan ce with applicable provisions of ASTM A121. It shall be composed of No. 12 1/2 gauge (2.5 mm) galvanized or aluminum coated steel wire with four round 14 gauge (2.0 mm) barbs at 1140 approximately 5 in. spacing. The galvanized coating shall be in accordance with class 3 in Table 2. The minimum al uminum coating shall be in accordance with class 60 for the line wire and class 20 for the barb wire. The weight of coating shall be determined in accordance with ASTM A428. The use of aluminum barbs, in accordance with ASTM B211, alloy 5052-H38, nominal diameter No. 12 gauge, will be allowed. 910.18 1079 The use of barbed wire with No. 15 1/2 gauge (1.70 mm), high tensile strength line wires, and No. 16 1/2 gauge (1.47 mm) barbs will be allowed. The barbs shall be round with four points and spaced at approximately 5 in. intervals. The barbed wire shall be in accordance with ASTM A121. The galvanized coating shall be in 1150 accordance with class 3 in Table 2. A type C certification in accordance with 916 shall be provided for the barbed wire.
5.Bridge Railing Pedestrian Fence Fence posts and horizontal rails shall be in accordance with 910.13(b)1. The zinc- coating weight shall not be less than 2 oz/sq ft. Base plates shall be steel in accord ance with ASTM A709, grade 36 or 50. 1160 Galvanization shall be in accordance with AASHTO M 111. The zinc-coating weight shall not be less than 2 oz/sq ft. The chain link fabric shall be coated wire of 9 gauge, with a mesh size of 2 in. The zinc-coating weight of fabric shall not be less than 2 oz/sq ft. The zinc-coating weight of brace bands, fabric ties, fence post loop caps, fence post caps, horizontal rail end cups, tension bands, and tension bars shall not be less than 1.2 oz/sq ft. A Type C certification in accordance with 916 shall be provided for the bridge railing pedestrian fence. 1170
c.Aluminum Fabric Chain Link Fence This fence shall be in accordance with th e applicable requirements of 910.18(b) except for composition of materials. Requirements for the various component parts of aluminum fence shall be as shown in Table 1. Table 1 Item ASTM Reference Alloy Additional Information Fabric B211 Al-clad 5056 or 6061-T94 Barbed Wire - Line Barbs B211 5062-0, H38, or 6061-T89 2-strand dia. 0.110 in. 4-pt barb. dia. 0.080 in. 5 in. space B211 5052-H38 Tension Wire B211 Al-clad 5056 or 6061-T94 Dia. 0.192 in.; Note 1 Hog Ring Fasteners B211 6061-T94 Dia. 0.110 in. Wire Ties B211 1100-H18 Dia. 0.148 in. Flat Band Ties B211 3003-H14 1.2 in. wide; 0.06 in. thick Stretcher Bars B211 6063-T6 3/4 in. by 1/4 in.; square edges (continued on next page) 910.18 1080 (continued from previous page) Item ASTM Reference Alloy Additional Information Truss and Brace Rods B211 or B221 6061-T6 Dia. 3/8 in. Turn Buckles B26 (cast parts), B211 (wrought) 356.0-T6 6061-T6 Bands B221 6063-T6 1/8 in. by 1 in. beveled edge Bolts B211 or B221 2024-T4 ASA B 18.2 hexagon threads class 2, 2A, or 2B Nuts B211 or B221 6061-T6 Expansion Sleeves B210 3003-H18 1.695 in. ID by 0.078 in.; wall drawn type. 6 in. long; self-centering Post Tops, Rails and Brace Ends B26 or B108 356.0T6 Fabricated in permanent molds or sand castings Top and Brace Rails B241 and B429 6063-T6 1 1/4 in. pipe; Note 2 Barbed Wire Extension Arms B26 or B108 356.0T6 Fabricated as for post tops; sheet castings Line Posts B241 and B429 6063-T6 2 in. pipe; Note 2 Corner Posts B241 and B429 6063-T6 2 1/2 in. pipe; Note 2 Note 1: Aluminum coated steel wire in accordance with 910.18(b) may be used. Note 2: ANSI schedule 40 pipe, plain ends.
d.Gates Gate posts sizes shall be as follows: ANSI Nominal Pipe Size Swing Gate Opening, (inclusive) Single Gate Double Gate 2 1/2 in. Up to 6 ft Up to 12 ft 3 1/2 in. 7 to 13 ft 13 to 26 ft 6 in. 14 to 18 ft 27 to 36 ft 8 in. 19 to 32 ft 37 to 64 ft
1.Steel Gates Steel gate posts shall be standard weight , galvanized, steel pipe in accordance with ASTM F1083 and furnished with all necessary fittings. Post sizes shall be as set out above. The gate frames shall be of standard weight, galvanized, steel pipe in accordance with ASTM A53, of 1 1/2 in. (38.1 mm) nominal size, and shall have welded joint or riveted construction using galvanized pressed steel or malleable 1190 fittings. Areas welded after galvanizing shall be coated with a material conforming to the requirements of Federal Specification TT -P-641, Type II or Military Specifications DOD-P-21035. When spray paints are used, two coats shall be applied. Fabric coverings for gates shall be in accordance with 910.18(a) or 910.18(b). These gates 910.18 1081 shall be furnished with necessary fastenings , hinges, center stops, and locking devices galvanized after fabrication in accordance with ASTM A153.
2.Aluminum Gates Aluminum gate post sizes shall be in accordance with 910.18(d). They shall be ANSI schedule 40 pipe and in accordance with ASTM B241 or B429, alloy 6063-T6. 1200 Gate frames shall consist of 1 1/2 in. schedule 40 pipe assembled by welding or with fittings. Pipe shall be in accordance w ith ASTM B241 or B429, alloy 6063-T6. Welding material and procedures shall be in accordance with the applicable AWS provisions. Formed sheet fittings shall be in accordance with ASTM B209, alloy 6061- T6. Gate hinges may be offset type wrought aluminum, ASTM B209, alloy 6061-T6, or galvanized malleable iron. Fabric shall be in accordance with 910.18(c). 910.19 Overhead Sign Structures The complete structure with signs in pl ace shall be able to withstand loads in accordance with AASHTO Standard Specifi cations for Structural Supports for 1210 Highway Signs, Luminaires and Traffic Signals. The structure shall be designed to resist fatigue of the material in acco rdance with the AASHTO specifications. All prefabricated structural units shall be packed so that there is no injury or defacement during transportation to the point of destination. All bolts, nuts, and washers for bridge bracket assemblies shall be stainless steel in accordance with ASTM F593. Strain poles for cable span signs shall be in accordance with 922.10(a). Each strain 1220 pole shall include three band-type attachment s for span wire clam ps. Such attachments shall be galvanized in accord ance with ASTM A153. Cable shall be in accordance with 922.10(e)2. Each cable shall include three wire rope clips at each end. Anchor bolts shall be in accordance with 922.10(c)5. All sign mounting hardware, except for the extruded aluminum bar, shall be galv anized in accordance with ASTM A153. Gratings for the walkway shall be of aluminum in accordance with ASTM B221, alloy 6061-T6 or 6063-T6. Cross bars and bent connecting bars shall be of aluminum in accordance with ASTM B221, alloy 6 061, 6063 or 3003 conforming to ASTM B210. 1230 A Type C certification in accordance with 916 shall be provided for the overhead sign structure. (a) Aluminum Trusses for Overhead Sign Structures, Box Truss and Dynamic Message Sign Structure Truss Extruded tubes and other shapes shall be of aluminum in accordance with ASTM B221, B241, or B429, alloy 6061-T6. All other castings shall be of aluminum in accordance with ASTM B26, alloy 356.0-T6. Gusset, flange, and stiffener plates shall 910.19 1082 be of aluminum in accordance with ASTM B209, alloy 6061-T6. Plates shall be free 1240 of sharp edges and irregularities. Bolts, nuts, screws, and flat washers shall be passivated Type 304 stainless steel. Bolts and screws shall be in accordance with ASTM A193, grade B8. Hexagon nuts and washers shall be in accordance with AS TM A194, grade 8. High strength bolts, nuts, and washers for chord splice connections, with matching lock nuts having steel inserts, shall be in accordance with 910.02( g) and shall be galvanized in accordance with AASHTO M 232, class C or D. Neoprene pads shall be ultraviolet rated and shall conform to the requirements in 1250
915.04 Welding material and procedures shall be in accordance with 803 and applicable
AWS provisions. Certified proof of the qualifications for a minimum of two welders shall be presented after the contract is awarded a nd before fabrication is started. This certification shall be from a commercial or public testing laboratory and qualifications shall be based on welding of aluminum alloy, 6061-T6 with consumable electrode type welding using aluminum al loy ER5356 filler material. Welders shall qualify by 1260 passing the requirements set out in 803.04. Welding shall be checked by visual inspection. Poor welding workmanship shall be rejected. Each complete structure shall be free fr om any misfits or stru ctural deficiencies prior to shipment. (b) Steel Overhead Sign Structures, Cantilever, Monotube, Tri-Chord, Bridge Attached, and End-Supports for Box Truss and Dynamic Message Sign 1270 Structure End-support members for box truss and dynamic message sign structure shall be fabricated from constant cross-section tubular steel or extruded steel shapes as indicated on the drawings. Sections used for end-support columns, diagonal and horizontal members shall be constant cross-section tubular members in accordance with ASTM A53, type E or S, grade B, minimum yield strength of 35,000 psi. Constant cross-section tubular steel with greater yield strength may be used with written approval. Structural dimensions shall remain as shown on the plans. Sections used for cross support beams shall be constant cross- section extruded W-shapes in accordance with ASTM A709, grade 36. Base plates sh all be in accordance with ASTM A36. Base 1280 plates for columns shall develop the full strength of the columns. Structures shall be galvanized after fabrication in accordance with ASTM A123. Support columns for the cantilever structure shall be fabricated from constant cross-section tubular steel as indicated on the drawings. Column sections shall be in 910.19 1083 accordance with ASTM A53, type E or S, grade B as shown on the plans. Members shall have minimum yield strength of 35,000 psi. Constant cross-section tubular steel with greater yield strength may be used with written approval. Structural dimensions shall remain as shown on the plans. Base pl ates shall be in accordance with ASTM A36. Base plates shall develop the full strength of the columns. 1290 Cantilever arms shall be either double arms or quadri-chord trusses as shown on the plans. Cantilever arms shall be fabricated from octagonal tubular member with 0.14 in./ft taper and in accordance with ASTM A595, grade A or B, or ASTM A572, grade 50. Quadri-chord arms shall be of constant cross-section tubular members in accordance with ASTM A53, type E or S, grade B as shown on the plans. Members shall have minimum yield strength of 35,000 psi. Steel with greater yield strength may be used with written approval. Structural dimensions shall remain as shown on the plans. 1300 Structures shall be galvanized after fabrication in accordance with ASTM A123. Plates shall be free of sharp edges and irregularities. High strength bolts, nuts, and washers for chord to column connections, with matching lock nuts having steel inserts, shall be in accordance with 910.02(g) and shall be galvanized in accordance w ith AASHTO M 232, class C or D. Other bolts, U-bolts, nuts, screws, and flat washers shall be passivated Type 304 stainless steel. Bolts and screws shall be in accordance with ASTM A193, grade B8. Hexagon nuts and washers shall be in accordance with ASTM A194, grade 8. 1310 Bridge attached structures shall be fabricated from constant cross-section tubular steel in accordance with ASTM A53, type E or S, grade B with a minimum yield strength of 35,000 psi. Constant cross-section tubular steel with greater yield strength may be used, with written approval. Structural dimensions shall remain as shown on the plans. Structures shall be galvanized after fabrica tion in accordance with ASTM A123. Tri-chord truss structures shall be made of constant cross-section tubular members in accordance with ASTM A53, type E or S, grade B minimum yiel d strength of 35,000 1320 psi. Monotube structures shall be made of tapered tubular members in accordance with either ASTM A595, grade A or B, or ASTM A572, grade 50. Structures shall be galvanized after fabrication in accordance with ASTM A123. The J hook shall consist of one 3/8-in. steel bar in accordance with ASTM A307. It shall be spot welded to the inside of the end-support member. The J hook shall be hot-dip galvanized prior to welding or in the final assembly with the support column. Anchor bolts, nuts, and washers shall be in accordance with ASTM F1554, grade 36. A hexagon nut, leveling nut, and flat wash er shall be furnished with each anchor 1330 bolt. Top ends of anchor bolts and associated hardware as shown on the plans, shall 910.19 1084 be either hot dip galvanized in accord ance with ASTM F2329 or mechanically galvanized in accordance with ASTM B695, Class 55. Base plate skirts shall be 10 gauge galvanized steel. Welding material and procedures shall be in accordance with 711.32 and applicable AWS provisions. Welding shall be checked by visual inspection. Poor welding workmanship shall 1340 be rejected. Each complete structure shall be free fr om any misfits or stru ctural deficiencies prior to shipment. Strain poles shall be anchor bolt type complete with hand-holes and pole top or cap. They shall meet the requirements set out above for cantilever sign structures. Each pole is to include three band-type attachments for span wire clamps. The band shall be from material in accordance with ASTM A572 grade 50, ASTM A606, or approved equal. The bands shall not be of the U-bolt type. The poles shall have maximum 1350 deflections as shown below when loaded 18 in. from the top with a 100 lb load. Pole Size Deflection 15 in. by 30 in. 0.16 in. 14 in. by 26 in. 0.12 in. The steel flanges at the center of the cr oss beam and at the ends of the horizontal arms shall be fastened to the tapered or straight sections by means of two circumferential welds. One of the circumfere ntial welds shall weld the outside of the flange firmly to the tube. The flange connection shall develop fully the strength of the tubular sections being joined together by means of the flange connections. Gusset, flange, and base plates shall be in accordance with ASTM A36 and shall 1360 be galvanized after fabrication in accord ance with ASTM A123. Base plates for upright poles shall develop the full strength of the poles. Castings for the vertical pole top and horizontal arm and cap shall be in accordance with ASTM A126 and shall be galvanized with a minimum coating of 2 oz/sq ft. High strength heavy hex bolts and nuts, except anchor bolts, shall be in acco rdance with ASTM F3125, grade A325, Type 1, and ASTM A563. Two nuts for use in plumbing upright poles shall be furnished with each anchor bolt. Bolts, nuts, washers, and the top ends of anchor bolts shall be either hot dip galvanized in accordance with ASTM F2329 or mechanically galvanized in accordance with ASTM B695, Class 55. Welding shall be in accordance with
711.32 1370
Beam clamp details and sign support asse mblies shall be galvan ized in accordance with ASTM A153. Clamps shall be fabricated of high strength, low alloy steel in accordance with ASTM A242, ASTM A606, or approved equal. Stainless steel U-910.19 1085 bolts may be used in lieu of the clamps for the attachment of the sign hangers to the arms of double arm cantilevers. The U-bolts shall be in accordance with 910.19(a) for stainless steel hardware.
910.20 Steel Bridge Railing Components Materials for steel bridge railing components shall be in accordance with the 1380
following:
a.Railing and posts tubing shall be in accordance with ASTM A500, grade B.
b.Posts, connection plates, splice bars, base plates, and anchor channel bars shall be in accordance with ASTM A709, grade 36. High strength steel posts and connection plates shall be in accordance with ASTM A709, grade 50.
c.Steel bolts, nuts, and cap sc rews shall be in accordance with ASTM A307.
d.Railing end caps shall be st eel castings in accordance with ASTM A27, grade 70-36.
e.Threaded rods, nuts, and wa shers shall be in accordance with ASTM A449, ASTM A563, and ASTM F436, respectively.
f.Steel washers shall be standard round cut or lock washers as shown 1400 on the plans.
g.Cap screws shall be stainless steel in accordance with ASTM A276, type 304, 305, or 430.
h.Anchor bolts shall be galvanized and in accordance with 910.02(g)2. Threads may be cut or rolled.
i.Railing tubing, posts, connection plates, splice bars, base plates, anchor channel bars, and railing end caps shall be galvanized after 1410 fabrication in accordance with AASHTO M 111. Bolts, nuts, cap screws, washers, and lock washers shall be galvanized after fabrication in accordance with AASHTO M 232.
j.A Type A certification in accordance with 916 shall be provided for the anchor bolts. The results of the following shall be shown on the certification for the anchor bolts: 910.20 1086 Property ASTM Test Standard Tensile strength F3125 or A449 Proof load F3125 or A449 Hardness F3125 or A449 Coating thickness and weight A153 class C or B695 class 55 Rotational capacity F3125 A Type C certification in accordance w ith 916 shall be provided for the steel bridge railing components with the exception of bolts.
910.21 Steel Sheet Piling Steel sheet piling shall be in accord ance with ASTM A328, ASTM A1011, or
ASTM A653. 910.22 Grating for Grated Box End Sections
a.Type I Grated Box End Sections 1430 Steel pipe and steel tubing for grating shall be in accordance with ASTM A53, type E or S, grade B or ASTM A501, elect ric-resistance welded or seamless. Such pipe and tubing shall be galvanized in acc ordance with ASTM A123. All other related hardware shall be galvanized in accordance with ASTM A153. Pipe with a 4 in. outside diameter and in accordance with ASTM A513, Type 5, may be used as an alternate to the 4 in. outside diameter pipe specified. The pipe used as an alternate shall have a minimum wall thickness of 5/16 in. and a minimum yield strength of 50,000 psi. Steel tube of 4 in. by 4 in. by 3/8 in. and in accordance with ASTM A500, grade B, will also be allowed as an alternate to the 4 in. outside diameter 1440 pipe specified.
b.Type II Grated Box End Sections Structural steel grates shall be ASTM A36 for end sections having widths less than or equal to 3 ft and shall be ASTM A572, grade 50 for widths greater than 3 ft. A Type B certification in accordance with 916 shall be provided for the pipe, tubing, tube, and grates. The limits of the following shall be shown on the certification. Welding, as shown on the plans, shall be in accordance with 711.32 and 1450 AWS D1.1. 910.21 1087 Test ASTM Tensile Strength, Yield St rength, Outside Diameter, Wall Thickness, Galvanization Coating Thickness A53, type E or S, grade B Tensile Strength, Yield Strength, Wall Thickness, Outside Diameter (Round) or Unit Weight (Square/Rectangular), Galvanization Coating Thickness A501 Tensile Strength, Yield Strength, Bar Dimensions A36 Tensile Strength, Yield Strength, Bar Dimensions A572, grade 50 Wall Thickness, Outside Diameter, Yield Strength A513, Type 5 Tensile Strength, Yield Strength, Tube Dimensions, Wall Thickness A500, grade B
Source: Indiana Standard Specifications, 2024 Edition. Pages 1080–1095 of 1,248.