© 2013 Harrison, Walker & Harper. All rights reserved.
A Blast or explosion is a sudden release of stored energy. The energy creates an air blast and ground shock with spiking temperatures. The blast shock wave from that energy is composed of compressed air at supersonic velocity and debris picked up between the blast and structure. Typically the blast is measured in duration, reflected pressure, over-pressure (peak pressure) and negative pressure. It is important to consider charge weight, stand-off distance, pressure and duration when selecting a structure and location.
Protective Technologies is the engineering and validation company that used calculations/models/post-blast data analysis techniques, including Single Degree of Freedom (SDOF), Multiple Degree of Freedom (MDOF) and Finite Element Analysis (FEA), to validate our designs. In addition, our buildings were laboratory tested at the University of California San Diego Englekirk Center (Powell Structural Research Laboratories)
Blast or explosion resistance for Protective Structures is essential to our overall design, so we tested our structures against 4082 kg or 9,000 lbs of ANFO (equivalent of 7,650 lbs of TNT). Materials used by Protective Structures in our designs combine flexible and rigid construction techniques in concert to develop the overall best possible protection for personnel and equipment.
Protective Structures blast/explosion protection is the highest available today at 63 PSI (321 PSI msec) with an ASCE low damage structure response criterion.
Need to renovate or build a safe room, or hardened area within your structure? Protective Structures can custom design an enclosure that can be integrated seamlessly with your new or existing structure. Whether you need personal protection, hardened areas within your business or school buildings, we have a solution that can be tailor fit to your needs.
Why create a completely separate building or structure to protect your personnel and equipment, when the technology can allow you to integrate that protection directly. Classrooms and offices can become hazard resistant from blasts, ballistic and projectile weapons, forced intruder entry, wind (tornado or hurricane), flooding (integrated flood doors are available), and seismic forces. Talk with our technical staff to start the process of designing an integrated solution today.
All HRMs are available as completed units ready for operation. In addition, Protective Structures crews and licensed installers can setup your unit at your facility. We continue to support our HRM units even long after the sale is complete – your satisfaction is our goal.
Protective Structures can also provide a system kit where we containerize all the components and assembly instructions for field operations (no welding or “hot work required”). A trainer or installation crew can provide the technical assistance and installation ‘classes’ at your site.
All HVAC, doors and windows are blast resistant from fully qualified and tested manufacturers. Complete units can include electrical/power wiring, telecom/data wiring, water/wastewater plumbing; HVAC, windows, doors and interior design to specification.
Each of our units can be customized to meet the exact needs of our clients. Internal walls, rest-rooms, cabinets and other features commonly required are easily accommodated.
When purchasing a new unit, there is not a need to go with a strict standard size or layout – allow us the opportunity to meet all of your requirements. Our in-house fabrication and millwork can produce a wide variety of custom solutions faster than some companies can produce standard units.
Ballistic testing completed by Close Focus Research provided a UL Ballistic Rating Level of UL10 In addition to ballistic resistance, our structures also provide forced entry resistance for up to 30 minutes.
Testing of our structures against ballistic threats has included .50 caliber rifles at 10 feet and an assortment of other weapons (military and civilian) to ensure the highest levels of security.
Materials used in BRMs were tested by Western Electro-Acoustic Laboratory for sound transmission loss. ASTM minimum volume requirements are met at 80 Hz and above. The Sound Transmission Class rating determined in accordance with ASTM E 413-04 was STC-54.
Seismic / Wind
Earthquake protection is built into each unit we produce. Sear evaluation was completed by IAPMO-ES found all construction and materials techniques complied with the 2012 International Building Code and the 2009 International Building Code. Evaluation was in accordance with EC 003-2012. Due to the primary focus of blast protection, wind and seismic shear capacities far exceed the most stringent guidelines currently used in construction.
All our structures are resistant to fire and temperature spikes. All materials used in construction are non-flammable materials. Materials used in the HRM units are in compliance with the applicable requirements of the following criteria: ASTM E-119-08 and CAN/ULC S101-07 Standard Methods For Fire Tests of Building Construction and Materials. Intertek Testing Services NA Ltd. conducted full- scale fire tests on a 1 Hour and 2 Hour wall construction. The systems meet the requirements of UBC 7-2, ASTM E119, and CAN/ULCS101-M89, Standard Test Methods for Fire Tests of Building Construction and Materials, under load-bearing conditions, for 1-Hour and 2-Hour fire ratings
SEISMIC / WIND
© 2014 HWH Protective Structures, LLC. All rights reserved.