Elevated Bridges Guard Railings are metal guard railings that are installed along elevated bridges and highways to provide added safety and security. They have several features including a galvanized steel frame, a modular design, and a wide range of colors and finishes. They are designed to be long-lasting and easy to install.
Pipe railing for bridges is a type of architectural railing system used to define and separate pathways or stairways. The main specifications used when constructing a pipe railing include the size, length and diameter of the pipes, the height of the rails and the types of supports used. The most common finishes used are powder coating and galvanizing, with the most popular colour options being black, white and metallic silver.
We supply and install steel railing for various Elevated Bridges / Curbside viaducts in the airport construction and expansion projects.
Main types of bridge safety railings include Pipe railings, tube railings and Beam railings.
Supply of Railing for Elevated Bridges / Curbside Viaduct can include fixation and painting as well as other services.
Major products:
Steel Railing for Elevated Bridges
Railing for Curbside Viaduct
Typical Metallic Pipe and Tube Railings Quality Reference
Tubing: ASTM A 513.
Pipe: ASTM A 53/A 53M, Type F or Type S, Grade A, Standard Weight.
Finish: Galvanized finish for exterior installations: ASTM A 36/A 36M.
Cast Iron material: Gray iron, ASTM A 48/A 48M, or malleable iron, ASTM A 47/A 47M.
Brackets, Flanges, and Anchors are cast or formed same metal material and finish as the bridge rails.
FASTENERS for Hot-Dip Galvanized Railings
Type 304 stainless-steel or hot-dip zinc-coated steel fasteners complying with ASTM A 153/A 153M or ASTM F 2329 for zinc coating.
Steel Pipe Railings are fabricated according to customers requirements for design, dimensions, member sizes and spacing, details, finish, and anchorage, but not less than that required to support structural loads.
Metals are cut, drilled, and punched cleanly and accurately.
Burrs are removed and edges eased to a radius of approximately 1 mm unless otherwise indicated. No sharp or rough areas on exposed surfaces.
Form work true to line and level with accurate angles and surfaces.
Weep holes are provided where water may accumulate.
Cut, reinforce, drill, and tap as indicated to receive finish hardware, screws, and similar items.
Connections: Railings has either welded or nonwelded connections unless otherwise indicated.
Welded Connections: Cope components at connections to provide close fit, or use fittings designed for this purpose. Weld all around at connections, including at fittings.
Galvanized Railings:
Hot-dip galvanizing of steel and iron railings, complies with ASTM A 123/A 123M for hot-dip galvanized railings.
Railings hardwares comply with ASTM A 153/A 153M for hot-dip galvanized hardware.
Vent and drain holes are filled that will be exposed in the finished Work, unless indicated to remain as weep holes, by plugging with zinc solder and filing off smooth.
For galvanized railings, we also provide hot-dip galvanized fittings, brackets, fasteners, sleeves, and other ferrous components.
Preparing Galvanized Railings for Shop Priming: After galvanizing, thoroughly clean railings of grease, dirt, oil, flux, and other foreign matter, and treat with etching cleaner.
Preparation for Shop Priming: Prepare uncoated ferrous-metal surfaces to comply with requirements indicated below:
1. Exterior Railings: SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning."
2. Railings Indicated to Receive Primers Specified in Division 9 Section "High Performance Coatings": SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning."
3. Other Railings: SSPC-SP 3, "Power Tool Cleaning."
Shop-Priming and Painting Finish: Comply with Division 9 Section "High-Performance Coatings." For priming and painting of galvanized steel surfaces by epoxy primers and polyurethane coatings systems.
Perform cutting, drilling, and fitting required for installing railings.
Set railings accurately in location, alignment, and elevation; measured from established lines and levels and free of rack.
Do not weld, cut, or abrade surfaces of railing components that have been coated or finished after fabrication and that are intended for field connection by mechanical or other means without further cutting or fitting.
Set posts plumb within a tolerance of 2 mm in 1 m.
Align rails so variations from level for horizontal members and variations from parallel with rake of steps and ramps for sloping members do not exceed 5 mm in 3 m.
Corrosion Protection: Coat concealed surfaces of aluminum that will be in contact with grout, concrete, masonry, wood, or dissimilar metals, with a heavy coat of bituminous paint.
Adjust railings before anchoring to ensure matching alignment at abutting joints.
Fastening to In-Place Construction: Use anchorage devices and fasteners where necessary for securing railings and for properly transferring loads to in-place construction.
A. Metal sleeves are used and anchored into concrete for installing posts. After posts have been inserted into sleeves, fill annular space between post and sleeve with nonshrink, nonmetallic grout or anchoring cement, mixed and placed to comply with anchoring material manufacturer's written instructions.
B. Cover anchorage joint with flange of same metal as post, attached to post with set screws.
C. Leave anchorage joint exposed with 3-mm buildup, sloped away from post.
D. Anchor posts to metal surfaces with oval flanges, angle type, or floor type as required by conditions, connected to posts and to metal supporting members as follows:
1. For stainless-steel pipe railings, weld flanges to post and bolt to supporting surfaces.
2. For steel pipe railings, weld flanges to post and bolt to metal supporting surfaces.
3. For aluminum pipe railings, attach posts using fittings designed and engineered for this purpose.
A. Anchor railing ends at walls with round flanges anchored to wall construction and welded to railing ends or connected to railing ends using nonwelded connections.
B. Anchor railing ends to metal surfaces with flanges bolted to metal surfaces and welded to railing ends or connected to railing ends using nonwelded connections.
C. Attach railings to wall with wall brackets, except where end flanges are used. Provide brackets with 38-mm clearance from inside face of handrail and finished wall surface. Locate brackets as indicated or, if not indicated, at spacing required to support structural loads.
1. Use type of bracket with flange tapped for concealed anchorage to threaded hanger bolt.
2. Locate brackets as indicated or, if not indicated, at spacing required to support structural loads.
D. Secure wall brackets and railing end flanges to building construction as follows:
1. For concrete and solid masonry anchorage, use drilled-in expansion shields and hanger or lag bolts.
2. For hollow masonry anchorage, use toggle bolts.
Adjusting and Cleaning of Galvanized Steel Pipe Rails
For galvanized surfaces: Clean field welds, bolted connections, and abraded areas and repair galvanizing to comply with ASTM A 780.
Assemble railings in the shop to greatest extent possible to minimize field splicing and assembly.
Disassemble units only as necessary for shipping and handling limitations.
Clearly mark units for reassembly and coordinated installation.
Use connections that maintain structural value of joined pieces.
Add: No. 09 Neo-Tech District, Development Zone, Dezhou, Shandong Email: info@highwayguardrail.org URL: https://www.highwayguardrail.org