Delta Type Steel Truss Modular Bailey Bridges

Delta bridge (HZCB450) is a new type of large-span modular steel bridge that can be used to overcome obstacles such as large-span gullies and rivers. Delta bridge is a half-through bridge with a span of 35 to 81 meters in a single span. It can also achieve a multi-span design by adding pier supports, that is, the span length of the Delta bridge can extend infinitely. The deck of the Delta bridge can be made of steel and concrete. Steel decks are mostly used for semi-permanent modular steel bridges, while concrete decks are used for permanent bridges.

Modular Delta Bridge (HZCB450)

Content Index:

• 1.Overview
• 2.Benefits
• 3.Main Technical Parameters of HZCB450 Modular Steel Bridge.
• 4.Standard Specification
• 5.The Structure of Delta Bridge
• 6.Features of Delta Bridge
• 7.The Erection Method of Delta Bridge
• 7.1.Temporary support method
• 7.2.Cantilever propulsion method

Overview

ZHM Delta Bridges provide a proprietary pre-fabricated modular bridging system suited for long-spanning permanent applications on main highways or in rural areas. It uses standardised, interchangeable steel components with full highway loading capability to provide a permanent, lightweight, steel bridging solution which can be configured for clear spans of up to 100 metres. It can also be supplied in multiple spans, supported on intermediate piers, meaning that there is no limitation to the length it can bridge.

Combining the best of off-site fabrication with high speed construction and rapid installation, our Delta Bridges offer significant advantages over more traditional construction techniques which involve major site work. The versatility and robustness of its design means that it can be easily assembled and dismantled, making it equally suited to long-term temporary bridge applications.

ZHM Huawu Steel can supply a solution to suit your particular requirements and we are able to accommodate any special load requirements as well as site specific topography, extremes of temperature, high wind loads, and seismic requirements.

For more information on our Delta Bridges and how we can help you, speak to our Expert.

Benefits

Modular Rapid-build Can be assembled using light plant Can be crane built or cantilever launched Relocatable Transported in standard containers Robust Designed for high fatigue, permanent applications Long life with minimal maintenance Preloaded bolted connections Parapets as standard Factory applied anti-skid deck surfacing as standard Optional footwalks

Main Technical Parameters of HZCB450 Modular Steel Bridge.

Model:	HZCB450
Bridge truss height:	4.5m
Net width of bridge deck:	single lane 4.2m, double lane 7.35m
Design span:	span of a single span 36~81m
Deck material:	Steel deck or concrete deck
Material:	Q420qc,Q355
Max. weight of unit component:	2378 kg
Crane requirement:	35t; or 10t×10m truck crane
Sidewalk:	External or internal, support 1m, 1.2m, 1.5m sidewalk
Design load:	American Bridge Load Standard HS20-44, Chinese Bridge Load Standard Tracked vehicle 60 tons, Highway ClassⅠLoad
Unit weight (steel deck):	2.63t /m (single lane),3.5t/m (double lane)
Connection type:	high strength friction grip bolts or high strength bearing bolts

Standard Specification

Module length	4.5m
Carriageway widths	4.2m to 10.5m
Number of lanes	1, 2 or 3
Internal pedestrian walkways	0.5m or 1.0m
Cantilever pedestrian walkways	Up to 1.5m
Finish	Hot-dip Galvanised: BS EN ISO 14713 & 1461 ASTM A123

 The Structure of Delta Bridge

 

Delta bridge is mainly composed of upper chords, lower chords, triangular webs, cross beam, bridge deck and connectors, which belong to through bridge. The upper and lower chords of the main truss of Delta bridge are modular steel units with a cross-section of “H”, and the web members are modular units with an external shape of “K”. Between the two chords, the web and the web, and the web and the chord are all connected by compression and shear-type high-strength bolts through the gusset plate. This design reduces the non-elasticity deflection caused by the pin hole.


Features of Delta Bridge

HZCB450 Modular Steel Bridges

HZCB450 Modular Steel Bridges

Simple structure, strong bearing capacity, small deflection, long service life and good overall appearance; Large span, the maximum single span of a single lane is 81 meters, and the maximum single span of a two-lane lane is 72 meters; Single hole span: 36m, 45m, 54m, 63m, 72m, 81m; External or internal sidewalks can be designed on both sides of the bridge; Delta Bridge can be used as a semi-permanent or permanent bridge; It can interface with the Bailey Bridge and install it using the Bailey Bridge (CB200) as a guide beam for erection

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The Erection Method of Delta Bridge

1. Temporary support method
 

The temporary support method is to build temporary support columns to support during the erection of a certain length of the main girder. After the erection of all modular steel bridges is completed, the temporary support columns are removed. If the modular steel bridge is designed with multiple spans as required, the piers should be constructed first, and then the support of the piers should be used for the erection of the Delta bridge.


2. Cantilever propulsion method
 

The cantilever propulsion method is a common method for modular steel bridge construction. This method is quick to erect, safe and reliable and does not require large-scale lifting equipment. Before the bridge is erected, a plain roller and rock roller are installed on both banks of the river in advance. Most of the components of the Delta bridge were assembled in advance on the rollers on the side of the push-out side, and then the bridge was pushed out smoothly and slowly by manpower or mechanical traction until it reached the rock roller position on the opposite bank. The CB200 Bailey panels are used as the launching nose when the Delta bridge is erected, and the number of launching noses is determined by the number of bridge sections.

Why ZHM Huawu Metal Delta Type Steel Truss Modular Bailey Bridges ?

Reliable and Customized Designs	Cutting Edge Designing Process	Free Online Price System	Easy Bolt-by-number Assembly
Over Two Decades of Experience	Value For Money	Unmatched in Quality and Craftmanship	Excellent Customer Service

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HOW CAN WE HELP YOU?

ZHM’s world-class team — together with our raw material suppliers and subcontractors — works to solve your most challenging design, engineering, farbrication or construction issues.

Contact ZHM by telephone at +86 135-8815-1981 (wechat and whatsapp) or send us your questions via email to info@zhmsteelworks.com