Rapidly rescuing those trapped beneath concrete

Racing against time
CIRT busted an 18-inch diameter hole through this six-inch slab of reinforced concrete in just under 3 ½ minutes in an Aug. 30 demonstration conducted at the Technologies for Critical Incident Preparedness Conference in Washington, D.C. Credit: DHS S&T

When the twin towers collapsed on September 11, 2011, one of the most critical challenges that first responders faced was cutting through concrete to get to victims trapped under debris – a painful and tedious race against time when tragedy strikes. Breaching reinforced concrete has long been a losing race when relying on drills, saws, and jackhammers.

The Department of Homeland Security's Science and Technology Directorate (S&T) has developed a new tool to help fire departments and search-and-rescue teams overcome these challenges caused by fallen in natural and man-made disasters.

In 2007, S&T spearheaded the development of the Controlled Impact Rescue Tool (CIRT™), designed to cut through with speed and precision. The CIRT uses blank ammunition cartridges to drive a piston that generates a high-energy jolt to create a contained hole in the concrete. A series of these holes allows the creation of an area large enough to deliver vital supplies such as food, water and medicine to victims before are able to get victims to safety.

Racing against time
This is the Controlled Impact Rescue Tool (CIRT) unit in its carrying box. Credit: DHS S&T

The force generated by the CIRT is concentrated in a localized area, minimizes threats to the safety of survivors and the potential destabilization of the surrounding structure. CIRT is the size of a small suitcase and weighs approximately 100 pounds, making it mobile enough for a pair of rescuers to hold against a wall, yet heavy enough to limit recoil that can cause injury. It is capable of breaching a reinforced concrete wall up to four times faster than traditional methods.

The Federal Emergency Management Administration (FEMA) has already acquired six CIRT units to add to their search-and-rescue capabilities. S&T also plans to distribute CIRT units to municipal search-and-rescue teams in Cincinnati, Los Angeles, Seattle, Fairfax County and Virginia Beach, Va., and Texas Disaster City®, a training ground used by urban search-and- rescue (USAR) specialists.

Racing against time
A child is rescued from beneath collapsed concrete. Credit: FEMA

In 2008, Popular Science magazine identified S&T's concrete-blasting lifesaver as a "Best of What's New."

"That pleased us, but since then, we've refined the design to make it even more affordable for urban search-and-rescue teams across the nation," says Jalal Mapar, project manager of S&T's Infrastructure Protection & Disaster Management Division. CIRT has now completed all phases on research, development, testing and evaluation, and is currently being manufactured by Raytheon, S&T's research partner on this project.


Explore further

'Nitty-Gritty' but Vital Data Helps Field Rescue Robots

Provided by US Department of Homeland Security - Science and Technology
Citation: Rapidly rescuing those trapped beneath concrete (2011, September 21) retrieved 20 April 2019 from https://phys.org/news/2011-09-rapidly-beneath-concrete.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
0 shares

Feedback to editors

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more