While the U.S. Department of Defense has prohibited the use of blast film on windows in most military buildings and facilities, the government has different security standards for federal buildings. The Public Buildings Service Leasing Desk Guide, which details the policies and procedures of federal buildings, states that all exterior windows must feature “shatter resistant material” that meets specific standards:
WINDOWS
SHATTER-RESISTANT WINDOW PROTECTION
The Lessor shall provide and install shatter-resistant material not less than 0.18 millimeters thick on all exterior windows in Government-occupied space meeting the following properties – Film composite strength and elongation rate measured at a strain rate not exceeding 50% per minute shall not be less than the following:
– Yield Strength: 12,000 psi
– Elongation at yield: 3%
– Longitudinal Tensile strength: 22,000 psi
– Traverse Tensile strength: 25,000 psi
– Longitudinal Elongation at break: 90%
– Traverse Elongation at break: 75%
THE ALTERNATE METHOD is for the Lesser to provide a window system that conforms to a minimum glazing performance condition of “3b” for a high protection level and a low hazard level. Window systems shall be certified as prescribed by WINGARD PE 4.3 or later to GSA performance condition 3b (in accordance with the GSA Standard Test Method for Glazing Window Systems Subject to Dynamic Loadings or Very Low Hazard (in accordance with ASTM F 1642, Standard Test Method for Glazing or Glazing Systems Subject to Air Blast Loading) in response to air blast load of 4 psi/28 psi-msec.
GSA Leasing Desk Guide
Chapter 19: Security
Blast Film: Daylight vs. Anchored Installation
Regarding the federal guidelines on blast film, it’s important to understand the differences between the two common types of blast film installation: “daylight” and anchoring. Daylight installation is the simple process of applying blast film only to the window glass. It’s designed to hold the glass together and prevent it from shattering. The problem with daylight installation is that it doesn’t hold the window pane to the frame or wall. In the event of an explosion, the window pane is still likely to fly off the wall and become a high-energy projectile capable of causing severe harm or death.
Blast film is only effective if it’s anchored to the frame or wall. In most anchored installations, the blast film extends beyond the edge of the glass and overlaps with the frame. This not only helps keep the glass from shattering during a blast, but also helps prevent the entire window from detaching.
If you’re going to use blast window film to provide a level of protection against an explosion, anchoring it is the most effective installation method. But daylight installation is easier and less expensive, so it’s more common. And building managers who aren’t aware of the differences between the two may be more likely to choose daylight installation simply because it’s cheaper. This is why it’s important to emphasize the correct installation method whenever discussing blast film.
The Short Lifespan of Blast Film
The federal guidelines also fail to address the short lifespan of blast film. Regardless of whether it was installed correctly or not, blast film deteriorates over time due to exposure to UV light. Typically, blast film must be reapplied every 15 years, depending on how quickly it has deteriorated. If it’s not, the film becomes useless and leaves building occupants as vulnerable to a blast attack as they would be had the windows never been treated in the first place.
This is precisely what’s happened to the hundreds of federal buildings that were treated with blast window film shortly after 9/11. At the time, blast film seemed like a quick and affordable way to increase a building’s physical security. As it turns out, maintaining blast film over the course of a building’s lifetime is quite expensive. To complicate matters, blast film isn’t time-stamped during the installation process, so keeping track of when it needs to be reapplied is difficult and rarely even done. This is one of the main reasons why the Department of Defense finally prohibited the use of blast film altogether in military buildings.
Blast Film Provides No Energy Savings
Another shortcoming of blast film is that it provides no energy benefits. Since windows play an important role in a building’s energy use, any kind of window upgrade – including security –should also make the building more energy efficient. Unfortunately, blast film doesn’t do anything to address solar heat gain, air infiltration, condensation and other factors that affect a building’s energy consumption.
Thermolite’s interior blast window retrofit, on the other hand, provides both bomb blast protection and significant energy savings. Building owners typically see a 20% utility reduction and a payback period that would work with most ESCO projects. Read more about the benefits of incorporating energy efficient bomb blast windows into ESCO projects.
Pingback: viagra online without prescription
Pingback: order cialis online
Pingback: cialis 10mg
Pingback: generic for cialis
Pingback: Lowest price for viagra
Pingback: Order viagra usa
Pingback: generic cialis 2019
Pingback: generic cialis online
Pingback: cialis pills
Pingback: cialis professional
Pingback: price of cialis
Pingback: online pharmacy viagra
Pingback: cheap viagra
Pingback: online pharmacy viagra
Pingback: otc ed pills
Pingback: erectile dysfunction medications
Pingback: top erection pills
Pingback: online pharmacy
Pingback: rx pharmacy
Pingback: Real cialis online
Pingback: vardenafil coupon
Pingback: vardenafil 10mg
Pingback: levitra coupon
Pingback: slot machines
Pingback: slot games
Pingback: viagra without doctor prescription
Pingback: online casinos
Pingback: real money casino games
Pingback: cialis tadalafil
Pingback: payday loans
Pingback: cash loans
Pingback: personal loans
Pingback: viagra pills
Pingback: best real money online casinos
Pingback: generic cialis
Pingback: online casino no download blackjack
Pingback: online casinos
Pingback: cialis 5 mg
Pingback: blackjack software
Pingback: cialis to buy
Pingback: generic cialis
Pingback: cialis internet
Pingback: viagra online
Pingback: casino games
Pingback: free slots
Pingback: gambling casino
Pingback: viagra online
Pingback: viagra 100mg
Pingback: generic viagra cost
Pingback: viagra buy
Pingback: tadalafil online
Pingback: viagra online usa
Pingback: buy viagra online canada
Pingback: cialis 5 mg
Pingback: viagra price
Pingback: generic cialis at walmart
Pingback: best online pharmacy for viagra
Pingback: viagra prices
Pingback: cialis buy cialis online
Pingback: best real casino online
Pingback: rivers casino
Pingback: http://viagrabs.com
Pingback: propecia generic
Pingback: viagra generic
Pingback: can you buy viagra in stores
Pingback: cialistodo.com
Pingback: buy cheap viagra
Pingback: viagra
Pingback: buy cialis canada
Pingback: viagra
Pingback: cheap Viagra 130 mg
Pingback: Viagra 25mg tablet
Pingback: how to buy Viagra 130mg
Pingback: Viagra 150mg online pharmacy
Pingback: sildenafil pills
Pingback: cialis cialis
Pingback: generic viagra
Pingback: Cialis 80mg online
Pingback: Cialis 60 mg over the counter
Pingback: buy cialis
Pingback: Cialis 20mg united states
Pingback: generic viagra
Pingback: Cialis 60mg without prescription
Pingback: Cialis 10 mg without a prescription
Pingback: viagra coupons
Pingback: sildenafil 130mg coupon
Pingback: generic drugs
Pingback: tadalafil 10mg over the counter
Pingback: levitra 20mg for sale
Pingback: lasix 100 mg pharmacy
Pingback: cost of furosemide 100 mg
Pingback: canadian pharmacy no prescription
Pingback: propecia 1 mg for sale
Pingback: cheap lexapro 10 mg
Pingback: order viagra
Pingback: viagra buy
Pingback: abilify 10mg coupon
Pingback: viagra achat en france
Pingback: actos 15mg over the counter
Pingback: aldactone 100 mg coupon
Pingback: allegra 180 mg cost
Pingback: order amaryl 2 mg
Pingback: antabuse 250mg united kingdom
Pingback: antivert 25mg nz
Pingback: arava 20mg price
Pingback: viagra pill
Pingback: aricept 10mg coupon
Pingback: arimidex 1mg online pharmacy
Pingback: tamoxifen 10 mg pills
Pingback: generic cialis
Pingback: buy cialis online with paypal
Pingback: ashwagandha 60caps tablets
Pingback: atarax 25mg price
Pingback: augmentin 875/125 mg without a prescription
Pingback: buy cheap prescription drugs online
Pingback: inexpensive viagra
Pingback: cost of bactrim 800/160 mg
Pingback: order benicar 40 mg
Pingback: cialis no prescription canada
Pingback: buy viagra online
Pingback: natural viagra substitute
Pingback: Premarin 0,625mg no prescription
Pingback: buspar 5 mg coupon
Pingback: cialis low dose
Pingback: cheap viagra usa
Pingback: cheap cialis
Pingback: cialis for sale
Pingback: ceclor price
Pingback: ceftin 500 mg prices
Pingback: viagra for sale
Pingback: celebrex 200 mg united kingdom
Pingback: ed online pharmacy
Pingback: celexa tablets
Pingback: cephalexin otc
Pingback: viagra without doctor prescription
Pingback: cipro 250mg pills
Pingback: generic viagra
Pingback: how to buy claritin 10mg
Pingback: casinos
Pingback: casino real money
Pingback: casino slot games
Pingback: online slots
Pingback: casino games
Pingback: ED Pills Without Doctor Prescription
Pingback: online casino real money usa
Pingback: best real casino online
Pingback: online casino real money us
Pingback: casino online games
Pingback: best car insurance
Pingback: carinsurance
Pingback: auto-owners insurance
Pingback: how much viagra cost
Pingback: cialis for sale
Pingback: geico car insurance quotes
Pingback: car insurance quotes now
Pingback: auto car insurance quotes
Pingback: dairy land insurance
Pingback: affordable car insurance quotes
Pingback: ed treatment drugs
Pingback: direct car insurance quotes
Pingback: gap insurance quotes
Pingback: personal loans chicago
Pingback: canada ed drugs
Pingback: Approved viagra pharmacy
Pingback: payday loans stores
Pingback: fast payday loans
Pingback: online quick loans michigan
Pingback: cheap generic viagra online
Pingback: loans
Pingback: can we buy amoxcillin 500mg on ebay without prescription
Pingback: rapid payday loans
Pingback: personal loans online
Pingback: health benefits of cbd oil
Pingback: cbd oil benefits webmd
Pingback: sildenafil side effects
Pingback: how to use cbd oil
Pingback: buy viagra from mexico
Pingback: cbd oil for sale
Pingback: 100 mg viagra price walmart
Pingback: where can i buy viagra in usa
Pingback: payday loans direct lenders
Pingback: best cbd oil for pain
Pingback: cbd oil for sale colorado
Pingback: sildenafil online buy india
Pingback: cbd oil for arthritis
Pingback: hemp oil vs cbd oil for pain
Pingback: online viagra soft
Pingback: cbd oil for diabetes
Pingback: viagra 100mg in canada
Pingback: buy cheap essay
Pingback: cheap viagra soft
Pingback: college essay writer for pay
Pingback: demand assigned multiple access
Pingback: write my essays for me
Pingback: viagra medication cost
Pingback: college essay writer for pay
Pingback: what is the best essay writing service
Pingback: the best essay writing service
Pingback: cleocin 300mg generic
Pingback: buy sildenafil over the counter
Pingback: clonidine 0,1mg pills
Pingback: Canadian healthcare viagra sales
Pingback: clozaril 100 mg tablet
Pingback: colchicine 0,5 mg tablets
Pingback: symbicort inhaler nz
Pingback: cialis 20mg uk
Pingback: how to buy combivent 50/20 mcg
Pingback: Real viagra online
Pingback: where to buy coreg 12,5mg
Pingback: buy generic drugs cheap tablets
Pingback: compazine cost
Pingback: coumadin 1 mg united kingdom
Pingback: viagra and alcohol
Pingback: cheap cozaar 100 mg
Pingback: cymbalta australia
Pingback: generic viagra
Pingback: how to purchase dapsone 1000caps
Pingback: ddavp uk
Pingback: cheapest depakote
Pingback: diamox 250mg cost
Pingback: differin 15g tablet
Pingback: diltiazem 30mg online
Pingback: cheap viagra
Pingback: doxycycline price
Pingback: dramamine 50 mg cost
Pingback: elavil tablet
Pingback: canadian online pharmacy
Pingback: erythromycin 250 mg online pharmacy
Pingback: where to buy etodolac
Pingback: flomax 0,4mg without a doctor prescription
Pingback: generic Cipro
Pingback: flonase nasal spray 50 mcg for sale
Pingback: garcinia cambogia caps over the counter
Pingback: ed treatment review
Pingback: hyzaar 12,5 mg price
Pingback: imdur canada
Pingback: imitrex australia
Pingback: imodium without prescription
Pingback: mexican viagra
Pingback: useful source
Pingback: canadian pharmacy meds
Pingback: how to buy imuran
Pingback: indocin 75 mg no prescription
Pingback: buy zithromax without prescription online
Pingback: lamisil 250 mg generic
Pingback: viagra without doctor prescription
Pingback: levaquin over the counter
Pingback: lopid otc
Pingback: lopressor usa
Pingback: viagra without doctor prescription
Pingback: luvox no prescription
Pingback: meclizine tablets
Pingback: viagra substitute gnc
Pingback: ed drugs generic
Pingback: mestinon 60 mg no prescription
Pingback: micardis uk
Pingback: buy Valtrex online
Pingback: mobic canada
Pingback: canada online pharmacy
Pingback: motrin tablet
Pingback: viagra power 100
Pingback: nortriptyline 25mg pills
Pingback: periactin uk
Pingback: canada drug pharmacy
Pingback: how to purchase phenergan
Pingback: plaquenil tablet
Pingback: prevacid 30 mg coupon
Pingback: prilosec 20mg cheap
Pingback: proair inhaler online
Pingback: generic viagra
Pingback: procardia coupon
Pingback: proscar australia
Pingback: healthy man viagra
Pingback: cost of provigil
Pingback: best antibiotic for eye infection
Pingback: pulmicort canada
Pingback: amp10 antibiotic
Pingback: pyridium no prescription
Pingback: reglan 10 mg united kingdom
Pingback: remeron cost
Pingback: zyrtec d generic
Pingback: cost of retin-a cream 0.025%
Pingback: allegra 24 coupon
Pingback: revatio 20mg cheap
Pingback: buy risperdal 4mg
Pingback: cheap robaxin
Pingback: cost of rogaine 5%
Pingback: cheapest seroquel 300mg
Pingback: how to buy singulair 4 mg
Pingback: skelaxin pills
Pingback: viagra without a prescription
Pingback: spiriva nz
Pingback: cheapest tenormin 25mg
Pingback: thorazine 100mg australia
Pingback: toprol 25mg pills
Pingback: tricor 160mg cheap
Pingback: cheapest generic viagra
Pingback: valtrex coupon
Pingback: verapamil over the counter
Pingback: voltaren pills
Pingback: wellbutrin nz
Pingback: cialis price increase
Pingback: zestril 10 mg purchase
Pingback: zithromax cheap
Pingback: description
Pingback: zocor united states
Pingback: buy cheap generic zithromax
Pingback: zovirax online pharmacy
Pingback: sri lanka viagra
Pingback: buy zyloprim 300 mg
Pingback: zyprexa without a doctor prescription
Pingback: where to buy zyvox 600 mg
Pingback: sildenafil australia
Pingback: tadalafil over the counter
Pingback: furosemide 40mg no prescription
Pingback: how to purchase escitalopram 10 mg
Pingback: aripiprazole 15mg no prescription
Pingback: amoxicillin 500 mg tablet price
Pingback: pioglitazone 30 mg canada
Pingback: spironolactone 100 mg cost
Pingback: prescription drugs from canada
Pingback: fexofenadine pills
Pingback: cost of glimepiride
Pingback: meclizine 25 mg price
Pingback: order leflunomide 10 mg
Pingback: atomoxetine 40 mg online pharmacy
Pingback: donepezil generic
Pingback: cheap anastrozole 1 mg
Pingback: order viagra
Pingback: irbesartan prices
Pingback: dutasteride 0,5mg pharmacy
Pingback: olmesartan without a doctor prescription
Pingback: where to buy buspirone 5mg
Pingback: order clonidine 0.1 mg
Pingback: cefuroxime cheap