The double rod seismic brace is a dual-suspension, unidirectional bracing unit used in mechanical and electrical seismic support systems. It carries vertical load through two parallel suspension rods and provides horizontal seismic restraint in one direction perpendicular to the rod axis. The rods anchor to the structural ceiling through dedicated seismic connectors, while a rigid articulated diagonal brace runs from the rod assembly to a lateral anchor, forming a stable triangular geometry typically set at 45 degrees. Along that defined horizontal axis the brace transfers seismic forces into the building structure, while the vertical rods and pipe clamps handle the other direction. Designed under GB 50981, each unit is checked by mechanical calculation so the brace, connectors, and anchors stay within elastic limits at the specified seismic load, with the brace direction clearly marked on site.
Our line is built around the dual-rod configuration and drawing-based production. Because the two rods share the suspended weight, vertical load is split across two ceiling anchor points instead of concentrating on a single connection, which reduces demand on each anchor and suits wider linear runs. We manufacture to your project drawings, adjusting rod length, rod spacing, and drop height to the actual ceiling-to-pipe dimension rather than a fixed catalog length. Buyers receive rods already cut and drilled to their measured elevation, so on-site cutting is removed and the bracing drops into place without rework.
Specifications
|
Parameter |
Specification |
|
Core configuration |
Two suspension rods + one unidirectional diagonal brace |
|
Rod material |
Carbon steel |
|
Brace type |
Rigid articulated steel strut |
|
Brace angle |
45 degrees (typical) |
|
Design standard |
GB 50981 |
Applications
- Long, straight ventilation and air-conditioning duct sections. These runs carry a uniform linear load and their seismic demand is dominated by a single axis, so one unidirectional brace per bay controls movement while the two rods keep the duct level.
- Multi-row water or condensate pipe clusters. Two rods support a wider cluster without sag between hanger points, and one diagonal per frame locks the cluster against lateral sway along the pipe direction.
- Low-ceiling auxiliary services. Where ceiling height leaves no room for a portal frame, this slimmer dual-rod unit still delivers code-level restraint while leaving clearance for later inspection.
Customization
We adjust rod length and rod spacing to the measured ceiling height and pipe centerline, set brace angle per your structural drawing, supply alternate rod diameters or steel grades, and stamp the seismic direction on each piece. Drawing review and OEM marking are available.
Packaging & Transportation
Units are packed in fumigation-free plywood crates reinforced for international transport. We ship on FOB, EXW, or DDP terms, with payment by T/T.
FAQ
Q: Can the rod length be matched to my actual ceiling height?
A: Yes. Cut length, spacing, and drop height are set from your drawings or measured elevations, so rods arrive ready to install.
Q: What is the minimum order for a custom size?
A: Standard configurations have no fixed MOQ; regular custom units start from 10 pieces, and complex single-unit designs are negotiable.
Q: How do you control quality before shipment?
A: Components are inspected at incoming, during welding and surface treatment, and 100% checked before packing; third-party inspection is accepted.
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