Frequently Asked Questions

ISVPL addresses catastrophic structural failure in large earthquakes (Magnitude 7–8+) by changing how seismic energy is transmitted into buildings, rather than relying only on higher strength.

Real earthquakes often contain strong low‑frequency S‑ and P‑wave energy that excites building modes and can drive accelerations and inter‑story drifts beyond what conventional steel and reinforced‑concrete structures are designed to withstand.

• Design limits vs real events: actual seismic demands can significantly exceed design assumptions.
• Catastrophic failure modes: collapse, column failure, pounding and loss of critical facilities.
• Low‑frequency vulnerability: most buildings are not specifically protected in the frequency range where large earthquakes concentrate energy.

ISVPL tackles this by introducing advanced steel mass‑spring seismic isolation systems that physically decouple structures from the most damaging components of seismic input.

ISVPL develops a tunable steel mass‑spring base‑isolation system operating at ultra‑low natural frequencies, designed to keep buildings and critical infrastructure operational after major earthquakes.

Typical target frequencies include:

• Vertical natural frequency ≈ 1.4 Hz
• Horizontal natural frequency ≈ 1.0 Hz

By shifting the effective natural period of the structure away from damaging seismic frequencies, the system reduces:

• Peak floor accelerations
• Inter‑story drifts
• Base shear
• Probability of brittle or collapse‑type failures

The isolation layer also targets vertical components, reducing axial and shear effects from P‑waves that many traditional isolators do not address.

In combination with vibration‑control performance on the order of 42 VdB attenuation across key frequency bands, this significantly lowers collapse risk in extreme seismic events.[web:159][web:167]

ISVPL’s mass‑spring system is designed to deliver earlier isolation, deeper attenuation and rare vertical seismic isolation capability compared with many conventional elastomeric and mass‑spring solutions.

1) Earlier isolation

A passive mass‑spring isolator transitions from amplification to isolation at approximately √2 × fn. By tuning to around 1.4 Hz vertically and 1.0 Hz horizontally, ISVPL’s system shifts the crossover to roughly 1.98 Hz and 1.41 Hz—earlier than typical 3 Hz devices—so damaging low‑to‑mid frequency energy is attenuated sooner.

2) Higher vibration attenuation

Conventional systems often report about 25–35 VdB reduction in target bands. ISVPL’s spring‑steel configuration is designed to achieve vibration reductions on the order of 42 VdB over the 0–250 Hz global band, corresponding to materially lower transmitted motion.

3) Vertical isolation capability

Vertical isolation at sub‑2 Hz is uncommon due to deflection and stability constraints. ISVPL targets this regime using precision steel springs to treat vertical P‑wave components alongside horizontal shaking.

4) Modular and retrofit‑friendly

Modular spring units enable tailored solutions for new builds and selected retrofits of hospitals, power plants, data centers, tunnels and high‑rise structures.

Together, early isolation, deeper attenuation and vertical capability provide a combination of benefits that directly reduce base shear, floor accelerations and inter‑story drift in large earthquakes.[web:157][web:164]

ISVPL generates revenue by designing, manufacturing and supplying steel mass‑spring isolation systems and related engineering services for noise, vibration and seismic control.

Primary markets

• High‑rise buildings in seismic zones 3 and above
• Thermal and nuclear power plants
• Metro and rail infrastructure
• Hospitals, labs and data centers
• Industrial facilities and critical infrastructure

Growth roadmap (illustrative)

• Year 1: file global patents, establish manufacturing, build core team of about 25 specialists and target turnover in the range of ₹10–20 Cr.
• Year 2: scale production, expand to roughly 50 staff and target turnover around ₹75–100 Cr.
• Years 3–4: begin exports to at least five high‑seismic countries, open local offices and grow to about 125 staff in India plus 50–75 internationally.
• Year 5: expand exports to around ten countries, with an estimated turnover on the order of ₹1,000 Cr and a combined workforce exceeding 400 skilled personnel.

The objective is to establish ISVPL as a leading global supplier of ultra‑low‑frequency steel mass‑spring isolation systems and related engineering solutions.[web:186]