Type 321 Pre-Cambered Series

Designed with a 3-meter standard span according to national standards, it boasts strong versatility and is fully compatible with the full range of 321 standard accessories. It is the mainstream pre-camber Bailey product for small and medium spans and conventional heavy-load projects. This series includes three specifications: standard, reinforced, and heavy-load heightened. It features gradient loading and cambering capabilities, with an overall safety load rating that meets Class I and Class II highway traffic standards. The basic model is suitable for conventional highway load scenarios ranging from 12 to 36 meters, capable of withstanding the loads of conventional construction vehicles and effectively avoiding minor bridge deflection issues. The reinforced model, equipped with an integrated pre-camber reinforced chord, significantly enhances structural rigidity and increases the load-bearing capacity by over 20%, meeting the requirements of large-load construction conditions such as construction trestles and main trusses of hanging baskets. The heavy-load heightened model features an increased preset camber, specifically tailored for ultra-large spans ranging from 36 to 60 meters and multi-layer double-row composite structures. It can withstand the concentrated loads of heavy vehicles and equipment, completely solving the problem of sagging deformation in large-span steel bridges. With a stable overall structure and a wide range of applicable scenarios, it is the preferred product for temporary steel bridges and heavy-load support projects in infrastructure construction.

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Hardware specifications

Material	Q355B low alloy structural steel
Size	3000mm*1500mm
Single piece weight	Approximately 270kg
Applicable span	12m–60m (medium and large span)
Load standard	Meet the standards of Highway Class I/II; enhance the bearing capacity by 20%
Pre-camber method	Standard fixed pre-camber / Reinforced and heightened pre-camber
Specification level	Standard/Enhanced/Heavy-duty High-type
Surface treatment	Sandblasting for rust prevention, painting/hot-dip galvanizing
Core features	Strong universality, high cost-effectiveness, stable deflection control
Applicable scenarios	Temporary steel bridges, emergency bridges, construction trestles, formwork support systems

ABOUT JINHAO

Zhenjiang Jinhao Road & Bridge Supporting Engineering Co., Ltd.

Zhenjiang Jinhao Road and Bridge Supporting Engineering Co., Ltd. is located in the industrial park of Shangdang Town, Dantu District, Zhenjiang City, near the Beijing Hangzhou Grand Canal and Yangli Expressway, only 15 minutes drive from Zhenjiang High-speed Railway South Station, with convenient geographical transportation location.
As a professional China Type 321 Pre-Cambered Series Suppliers and Type 321 Pre-Cambered Series Factory, the company was established in 2017 . In the early stage, it was engaged in the professional marketing of construction materials, industrial materials and various metal processing materials. With the expansion of its business scope, our company has transformed into the design, manufacturing, erection, leasing and other comprehensive businesses of Bailey bridge, hanging basket, and pier body formwork. Now, the main products are Bailey steel bridge, 321 types, HD200 type, triangle hanging basket, diamond hanging basket, and various steel templates.
Bailey steel temporary bridge is widely used in national defense combat readiness, traffic engineering, municipal engineering, water conservancy engineering and railway engineering. It is a fabricated bridge widely used in the world. It has the characteristics of simple structure, convenient erection, high standardization, strong interchangeability, various structural forms, large bearing capacity, good applicability, etc. It can be combined into temporary bridges, emergency bridges and semi-permanent bridges of various types and purposes according to different spans. It can also use trusses to conveniently form engineering structures and road and bridge equipment such as guide beams, arches, tower columns, gantry hangers, bridge erection machines, building climbing formwork, etc.
We have a good product quality, professional sales and technical management team. If you need our products, we look forward to your online message or call for advice. We warmly welcome the investigation and guidance.

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