Metal Railings Art. 509.02 393 be considered as included in the unit bid price for the portland cement concrete item involved. Dowel bars in load transmission devices for pavement when required, will not be measured for payment. Reinforcement bars required for concrete piles or other reinforced concrete work in structures, where the concrete is not measured for payment in cubic yards (cubic meters), will not be measured for payment, but shall be considered as part of the piles or other complete units that are to be paid for as such. If the weight (mass) of the reinforcement per unit of measurement is increased from that shown on the plans, by authority of the Engineer, the additional weight (mass) of the steel will be measured for payment.
508.11Basis of Payment. Reinforcement bars in reinforced concrete
structures where the concrete is paid for at a unit price per cubic yard (cubic meter), will be paid for at the contract unit price per pound (kilogram) for REINFORCEMENT BARS or REINFORCEMENT BARS, EPOXY COATED.
Bar splicer assemblies will be paid for at the contract unit price per each for BAR SPLICERS.
Mechanical splicers will be paid for at the contract unit price per each for MECHANICAL SPLICERS.
509.01Description. This work shall consist of furnishing and erecting metal
railings, and furnishing, erecting, maintaining, and removing temporary steel railings.
509.02Materials. Materials shall be according to the following
Item Article/Section
Note 1. When galvanized fencing is specified, the chain link fabric shall be according to Article 1006.27(a)(1)a., b., or c. When painting is specified for posts and/or frames, the chain link fabric, ties and tensioning components shall be vinyl coated according to Article 1006.27(a)(1)d.
Art. 509.03 Metal Railings 394
CONSTRUCTION REQUIREMENTS
509.03General. Work shall be according to the details shown on the plans,
and lines and grades shall not follow any defects in the structure. When the structure is on a grade, rail posts shall be vertical, except posts for metal railings on concrete parapets and welded frames carrying chain link fencing shall be normal to the theoretical grade. Top of railings shall be parallel to grade line. High spots shall be ground and low spots shimmed.
All welds facing pedestrian areas shall be ground smooth in the shop. The rails shall be straight and true to line, without kinks, bends, or warps, and straightened as necessary before shipment.
509.04Shop Drawings. Before beginning fabrication, the Contractor shall
submit shop drawings to the Engineer according to Article 505.03. For railings constructed according to standard Department details, the drawings will not be formally reviewed, but will be included in the project record. When special non- standard details are required by the plans or proposed by the Contractor, the drawings shall be submitted for approval.
509.05Steel Railings. Fabrication, inspection, storage, and erection of steel
railings shall be according to Section 505, except that galvanized railing and accessories shall be stored according to Article 1006.34(d).
mounted posts, three galvanized or ASTM A 304 stainless steel shims per post, one at 1/8 in. (3 mm) and two at 1/16 in. (2 mm), shall be provided for 25 percent of the posts. Shims shall be similar to base plate in size and holes.
For side mounted posts, a 1/8 in. (3 mm) thick fabric reinforced elastomeric pad shall be placed between the post and the concrete.
For side mounted rails on multi-span bridges, sufficient galvanized steel shims shall be provided to align rails between adjacent spans. Various thicknesses may be used, with no more than three shims per post.
The 3/4 in. (M20) diameter high strength bolts used to connect the angles to the post shall be tightened according to Article 505.04(f)(2). The 1 in. (M24) diameter high strength bolts connecting steel to the concrete shall be brought to a snug tight condition and given an additional 1/8 turn. The 5/8 in. (M16) cap screws in the bottom of the posts shall be brought to a snug tight condition only.
Article 509.04, the tubular thrie beam rail section shall be fabricated by welding two thrie beam rail elements according to the details shown on the plans. The thrie beam rail section shall be according to the requirements of AASHTO M 180, Type 1, of the class specified.
All structural steel shapes and plates shall be galvanized.
Metal Railings Art. 509.05 395
Posts shall be attached to the concrete by drilling and setting anchor rods according to Article 509.06.
The standard length for a tubular thrie beam section is 25 ft 0 in. (7.5 m). Posts shall be provided at standard 8 ft 4 in. (2.5 m) centers whenever practical.
Posts shall not be located closer than 1 ft 3 in. (375 mm) to an existing bridge expansion joint or end of bridge.
In the event that standard lengths of tubular thrie beam cannot be longitudinally positioned to meet the requirements, shorter custom fabricated section(s) will be specified with a minimum length of 2 ft 6 in. (750 mm) and hole spacing for joints the same as full length sections.
All splice bolts shall be 5/8 in. (M16) diameter, unless otherwise noted.
Tubular thrie beam expansion joint shall be provided between any two posts which span a bridge expansion joint. Bolts located at expansion joints shall be provided with locknuts or double nuts and shall not be tightened beyond a point that prevents thermal expansion and contraction of the rail.
The expansion joint width shall be 2 1/2 in. (65 mm) at 50 °F (10 °C) and shall be adjusted for other temperatures according to the requirements of Article 520.04.
furnishing and installing of the chain link fabric, when specified, shall be according to Section 664. Stretcher bars shall be used on all four sides of each panel. The chain link fabric shall be placed along the pedestrian side as detailed on the plans. The maximum post spacing shall be 10 feet (3 m).
At the Contractor option, either cast in place anchor devices or drilled and set anchor rods may be used to attach the posts to the concrete. Drilling and setting of anchor rods shall be according to Article 509.06.
posts shall be extra strong (Schedule 80) pipe. Either welded or seamless pipe may be used. Rail panel lengths shall not exceed 7 ft (2.1 m) center-to- center of posts for 1 1/2 in. (40 mm) pipe and 8 ft (2.4 m) for larger diameter pipe. No railing shall be continuous for more than 40 ft (12 m) without expansion joints. Provision for expansion shall also be made in any panel crossing an expansion joint in the structure.
Connection of railings to posts shall be by the use of fittings or welding. One type of connection shall be used for railings throughout a structure. Welded joints shall be continuous, and weld surfaces shall be ground smooth. The use of couplings or unions will not be permitted.
When connections are made with fittings, rails shall be continuous through fittings at intermediate posts where expansion is not provided, and pinned,
Art. 509.05 Metal Railings 396 or welded to the fittings. Rails shall be threaded or welded into fittings at end and corner posts and shall have slip connections at points where expansion is provided.
The pipe handrail shall be fastened to the concrete or other support by means of standard flange plates with four anchors each. Anchors for this purpose shall have a diameter of not less than 5/8 in. (16 mm).
Whenever practicable, anchors shall be cast-in-place bolts, otherwise, they shall be anchor rods drilled and set according to Article 509.06.
When painted rail is specified, the cleaning and painting shall be according to Section 506, using the paint system specified for structural steel.
When galvanizing is specified, all posts, rails, splices, anchorage devices and plates shall be galvanized according to AASHTO M 111. Vent holes for galvanizing shall be placed in the posts and rails at locations that will not allow the accumulation of moisture in the members. Field drilled holes shall be spot painted with of one coat of aluminum epoxy mastic paint before erection. All bolts, nuts, and anchors shall be galvanized according to AASHTO M 232, except stainless steel hardware shall be uncoated.
509.06Setting Anchor Rods. Drilled holes in concrete for anchor rods shall
be to the diameter and depth required by the adhesive manufacturer for the size and type of anchor rod specified. The anchor rods shall be set with capsule or cartridge type adhesive systems that have been previously tested and approved by the Department. The sealed capsule or cartridge shall contain pre-measured amounts of adhesive chemicals and be installed according to the manufacturer’s written instructions.
509.07Temporary Steel Railing. The 1 in. (M24) diameter high strength
bolts or threaded anchor rods used to connect the posts to the deck shall be tightened according to Article 505.04(f)(2), except the nut shall only be rotated 1/8 turn beyond snug tight.
When required or allowed by the Engineer anchor rods may be drilled and set according to Article 509.06.
Contact surfaces between the post flange, rail, and inside face of the brackets for the alternate rail connection detail shall be free of all lubricants. The nuts for 5/8 in.
to snug tight and given an additional 1/8 turn.
After the removal of bolts and anchorage devices, all holes in the permanent deck shall be filled flush with the deck surface using a nonshrink grout. Anchors drilled and set in a permanent deck shall be cut flush with the deck surface after removal of the temporary steel railing.
509.08Aluminum Railings. During manufacture, transport, and erection,
railing shall be protected from scratching, denting or other defects that may affect its durability or appearance.
Slope Wall Art. 511.02 397 Rail elements shall be extruded in modular lengths of 30 ft (9 m), except for end/terminal sections, over expansion joints, or sections curved to a radius of 2300 ft (700 m) or less. Each rail element shall be attached to no less than two posts. All joints in rails shall be spliced as detailed.
Three aluminum shims per post, one at 1/8 in. (3 mm) and two at 1/16 in. (2 mm), shall be provided for 25 percent of the posts. Shims shall be similar to base plate in size and holes.
509.09Method of Measurement. This work will be measured for payment in
place in feet (meters). The length measured will be the overall length along the top longitudinal railing member through all posts and gaps.
509.10Basis of Payment. This work will be paid for at the contract unit price
per foot (meter) for STEEL RAILING, or ALUMINUM RAILING, of the type specified; STEEL RAILING (TEMPORARY); TUBULAR THRIE BEAM RETROFIT RAIL FOR BRIDGES; PEDESTRIAN RAILING; BICYCLE RAILING; BRIDGE FENCE RAILING; BRIDGE FENCE RAILING (SIDEWALK); PARAPET RAILING; and PIPE HANDRAIL.
SECTION 510. RESERVED
SECTION 511. SLOPE WALL
511.01Description. This work shall consist of constructing a reinforced
concrete or bituminous coated aggregate slope wall on a prepared earth bed.
511.02Materials. Materials shall be according to the following
Item Article/Section
Note 1. The aggregate used for bituminous coated aggregate slope wall shall be crushed stone conforming to Article 1004.01 for Class D quality, except that one of the following options shall apply.
COARSE AGGREGATE QUALITY QUALITY TEST Option 1 Option 2 Na2SO4 Soundness 5 Cycle, Max. % Loss Illinois Modified AASHTO T 104 35 25 Los Angeles Abrasion, Max. % Loss Illinois Modified AASHTO T 96 45 65
The aggregate gradation shall be RR 2 according to Article 1005.01(c).
Note 2. The bituminous material used for the bituminous coated aggregate slope wall shall be RS-2 or RC-70.
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