Seismic restraint and vibration damping is the combined engineering solution that ensures structural safety against earthquake loads while controlling machine-vibration transmission. Seismic hangers, flexible connectors and combined spring + elastomer mount systems protect against both lateral seismic effects and vertical vibration transmission.
What is seismic restraint?
Seismic restraint is the structural-bracing system that prevents mechanical equipment from displacing, sliding or detaching from pipes during an earthquake. Mandatory under fire codes and in hospital / critical-facility projects. Combining it with acoustic vibration damping requires special engineering.
Why a combined system?
A standard vibration isolator is effective during operation; but a rigid restraint is needed during an earthquake. Combined systems provide elasticity during operation (vibration damping) and limited movement during an earthquake (with seismic stops).
System components
- Spring isolator + seismic stop: elastic during operation, limited during earthquake
- Seismic hanger: horizontal-vertical combined support for suspended ducts/pipes
- Flexible connector: displacement tolerance at pipe / duct joints
- Seismic strap: horizontal load distribution
- Elastomer + steel combined mount: for light equipment
Where is it mandatory?
- Hospital (Turkish Building Earthquake Code)
- Emergency / fire centre
- Concert / theatre / event venue
- High-rise buildings (mechanical equipment protected during earthquake)
- Data centre
- Critical production facility
Design approach
Seismic design calculates earthquake acceleration, equipment mass, restraint points and movement limits together. In Turkey TBDY (Turkish Building Earthquake Code) and TS 498 standards apply; ASCE 7 (American) is used as reference.
Target performance
- Seismic safety: TBDY compliant
- Operating vibration reduction: 85%+
- Lateral displacement limit: equipment-dependent
- Flexible-connector tolerance: ±25 mm
Lead time and cost
Seismic restraint with design 2-6 weeks. Investment is mandatory for facility safety; small share compared with the risk of facility shutdown after an earthquake.
Certificates
FM Approved, OSHPD (California hospital standard) certified products are preferred; in Turkey a TBDY-compliant calculation report is prepared.
Features
On-site acoustic measurement and noise source analysis
Detailed engineering with professional simulation software
Certified material selection (BS476 Class 0, UNI 9175)
Meticulous installation and execution with our experienced team
Final measurement and performance warranty report
Process
Survey & Measurement
On-site survey and acoustic measurement.
Simulation & Design
Simulation with acoustic software, detailed quote.
Installation
Turnkey installation with certified materials.
Verification & Report
Final measurement, performance report, warranty.
Technical Specifications
| Application Standard | BS476 Class 0, UNI 9175 M1, Firex |
|---|---|
| Typical Noise Reduction | 25-45 dB (project-dependent) |
| Installation Time | Confirmed after survey (1-15 days) |
| Warranty | Measured result + 2-year workmanship warranty |