1-5 Support Brace (1-5AG34 / 1-5AG48 / 1-5AL42)
Diagonal brace that locks flat and inclined cantilever tubes into a rigid, vibration-resistant triangle.
Specifications
| Model | 1-5AG34 / 1-5AG48 / 1-5AL42 |
|---|---|
| Drawing No. | 1-5AG |
| Standard | TB/T 2075.1-2024 — Part 1: Cantilever support devices |
| Materials | Hot-dip galvanized steel tube (Φ34 / Φ48); aluminum alloy tube (φ42) |
| Installation | Connects the flat cantilever and the inclined cantilever to close the triangular structure |
The 1-5 support brace is the diagonal stiffening member of a cantilever support device. Joined at both ends through 1-6 support connectors, it links the flat cantilever and the inclined cantilever into a geometrically stable triangle — the arrangement that gives the cantilever assembly its rigidity against vibration and displacement while trains pass and wind loads act on the suspension.
Three sizes cover the speed classes: Φ34 and Φ48 hot-dip galvanized steel tubes for ≤200 km/h and 200–250 km/h lines, and the φ42 aluminum tube 1-5AL42 for 250–350 km/h aluminum cantilever systems. Adjustable connection holes at both ends let the brace adapt to different mast assembly dimensions.
Design Features
- High tube stiffness effectively suppresses cantilever vibration
- Adjustable end holes adapt to varying post assembly dimensions
- Interfaces match the 1-6 support connector family for tool-light erection
- Anti-corrosion finish suits long-term outdoor and tunnel service
The product is manufactured under CRCC railway product certification and an ISO 9001 quality management system, with incoming material inspection, in-process control on critical operations and batch-by-batch final inspection before delivery.
Used on every braced cantilever support together with the 1-3 cantilever connector and 1-6 support connectors. Henan Chuangwit supplies braces individually or in matched assembly kits, with selection calculations and site guidance. The brace connects the flat cantilever and the inclined cantilever and locks them into a geometrically stable triangle. This markedly raises the stiffness of the assembly and suppresses vibration and displacement of the suspension under train passage and wind. 1-5AG34 (Φ34) and 1-5AG48 (Φ48) hot-dip galvanized steel tubes, and 1-5AL42 (φ42) aluminum tube for the 250–350 km/h aluminum cantilever systems. The connection holes at both ends are adjustable, so the brace accommodates different mast assembly dimensions while the 1-6 support connectors close the joints. No. It is a stabilizing member: the messenger and contact wire loads flow through the cantilever tubes and connectors, while the brace keeps the triangle geometry rigid.Frequently Asked Questions
Why does a cantilever assembly need the 1-5 support brace?
Which sizes are available?
How is the brace length adjusted on site?
Does the brace carry contact wire loads directly?
Performance
Operating Conditions
Outdoor service as the diagonal stiffening member of cantilever support devices under suspension, wind and vibration loads.
Mechanical Performance
High tube stiffness suppresses assembly vibration; adjustable end holes accommodate differing assembly dimensions; anti-corrosion finish for long outdoor life.
Applications
Mainline Cantilevers
Standard triangle stiffening on every braced support.
Wind & Icing Regions
Rigid triangle resists dynamic loads.
Station Yards
Adjustable ends suit varied mast dimensions.
Pre-Assembly Shops
Pairs with 1-6 connectors for fast erection.
