ASTM B746/B746M-22e1 PDF

Overview

ASTM B746/B746M-22e1 is the internationally recognized standard specification for corrugated aluminum alloy structural plate designed for field-bolted assembly of pipe, pipe-arches, arches, underpasses, box culverts, and similar structures. Developed by ASTM International, this standard provides guidelines for the fabrication, dimensions, materials, assembly fasteners, and marking of aluminum structural plate components. These components are primarily used in drainage systems, pedestrian and vehicular underpasses, utility tunnels, and other projects requiring custom structural shapes assembled on-site.

Key Topics

• Material Specifications The standard details requirements for aluminum alloy structural plate, which must be fabricated from flat sheets or plates, then corrugated, punched for lap seams, and curved as needed. Only specific aluminum alloys and tempers are permitted, ensuring consistent strength and durability.

• Assembly Components Includes detailed requirements for fasteners and accessories such as bolts and nuts. Materials for these components must comply with referenced ASTM and ANSI specifications for steel, stainless steel, and aluminum fasteners.

• Dimensional Requirements Covers critical aspects such as plate thickness, corrugation geometry, and allowable tolerances for diameter, span, and rise. These ensure that all components are interchangeable and capable of being assembled into leak-resistant, structurally sound conduits or arches.

• Fabrication and Workmanship The standard mandates that structural plates must be manufactured with precision, including smooth corrugations, accurate hole placement for bolted seams, and proper marking for traceability.

Applications

ASTM B746/B746M-22e1 is essential for projects requiring robust, lightweight, and corrosion-resistant structural solutions. Key use cases include:

• Drainage Infrastructure Corrugated aluminum structural plates are widely used for culverts and stormwater management, thanks to their resistance to rust and easy field assembly.

• Transportation Tunnels Pipe, pipe-arches, and arch structures built to this standard are deployed in pedestrian walkways and vehicular underpasses, providing cost-effective and customizable options for both temporary and permanent crossings.

• Utility and Access Tunnels The modular nature of field-bolted aluminum plate makes it ideal for utility conduits and service tunnels, especially in locations where corrosion resistance is vital.

• Specialty Custom Shapes Projects with unique span and rise requirements benefit from the design flexibility permitted by this standard, supporting the creation of fit-for-purpose drainage and infrastructure solutions.

Related Standards

Projects using ASTM B746/B746M-22e1 often require integration with related ASTM standards for optimal performance and compliance. Important references include:

• ASTM B209/B209M – Aluminum and Aluminum-Alloy Sheet and Plate Specifies base material properties prior to corrugation.
• ASTM B790/B790M – Structural Design of Corrugated Aluminum Structures Provides guidance for the structural design aspects.
• ASTM B789/B789M – Installation Practices Details recommended installation methods for aluminum structural plate.
• ASTM A930 – Life-Cycle Cost Analysis Supports evaluating drainage system alternatives with economic analysis.
• ASTM B864/B864M – Corrugated Aluminum Box Culverts Applicable to box culvert shapes not covered in B746/B746M.
• Referenced Fastener Standards: Includes ASTM A307, A563/A563M, A449, F467, and others for fastener quality and compatibility.
• ASTM B666/B666M – Identification Marking of Aluminum Products Specifies permanent marking requirements for traceability.

Practical Value

Implementing ASTM B746/B746M-22e1 ensures reliable performance, interchangeability of components, and compliance with international best practices. By following this standard, engineers, contractors, and manufacturers can confidently design and build field-bolted aluminum drainage structures and tunnels that are durable, easy to assemble, and optimized for life-cycle cost.