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ISO 16933:2007 Arena Testing

GLASS IN BUILDING -- EXPLOSION-RESISTANT SECURITY GLAZING -- TEST AND CLASSIFICATION FOR ARENA AIR-BLAST LOADING

      ISO 16933 Blast testing

ISO 16933:2006 provides a structured procedure to determine the air-blast resistance of glazing and sets forth the required apparatus, procedures, specimens, other requirements and guidelines for conducting arena air-blast tests of security glazing.  Seven standard blasts simulating vehicle bombs and seven standard blasts simulating smaller satchel bombs that can be used to classify glazing performance are incorporated in this International Standard and cover a broad range of blast parameters.

To view products that can offer blast resistant properties, see the below links.

Stock items 

Bullet Resistant Transaction Window - Exterior / Interior Bullet Resistant Window with Electronic Speech, Ticket Window.

Night Pay Window / Hatch - A flat fronted Transaction Window with opening drawer, typically uses Petrol Stations and Pharmacies.

BR6  Guard House Transaction Window -Flat fronted Ballistic Window with opening drawer for document transfer. 

All of the above can also be manufactured in bespoke sizes.

Bespoke items 

Blast Resistant Glass -Laminated Blast resistant Glass to incorporate into Blast Windows and Doors                                                  

Blast Windows - Blast windows to protect against terrorist attacks and longer petrochemical explosions

Security Counters and Screens - Physical, Ballistic or Blast resisting counters for any application to keep staff secure.

Ballistic and Blast Resistant Guard Houses - Modular New Build or Upgrading existing. EN1522/3 FB2 to FB7, NIJ 0108.01 LII to IV UL 752.

Explosion Vents and Rupture Panels - Safety devices used to contain an explosive blast effect within a building.

Blast Resistant Doors - Steel manufactured doors offering blast protection to buildings

Security glazing, including that fabricated from glass, plastic glazing sheet material, glass-clad plastics, laminated glass, insulated glass, glass/plastic glazing materials and film-backed glass, can be tested and classified in a standard frame or tested but not classified in frames provided with the glazing.

Classification and ratings are assigned based on the performance of glazing loaded by air-blast pressures and impulses and are specific to the blast characteristics under which the test takes place.  Glazing that has received an air-blast classification and rating is suitable for use in blast-resistant applications only for blasts of comparable characteristics and only if installed in a properly designed frame.  Design based on knowledge of the air-blast resistance reduces the risk of personal injury. 

Classification Code (a) Mean peak air-blast pressure (kPa) Mean positive phase impulse (kPa-ms)
EXV45 (X) 30 180
EXV33 (X) 50 250
EXV25 (X) 80 380
EXV19 (X) 140 600
EXV15 (X) 250 850
EXV12 (X) 450 1200
EXV10 (X) 800 1600

 

(a) In the classification code, the letters, i.e. EXV refer to the type, i.e. a vehicle bomb; numbers denote a nominal standoff distance, expressed in meters, when a charge  of 100kg TNT equivalent is placed at a point perpendicular to the surface of the test specimen when mounted in a reaction structure (test cubicle) of face size abut 3 x 3 m and (X) denotes the hazard rating received during the test.  For example, classification code EXV25 (C) applies to a test in which a standard blast having peak air-blast pressure of 80kPa and positive phase impulse of 380 kPa-ms, resulting in damage to the glazing resulting in hazard rating C.

Nominal charge sizes and standoff distances for typical test frames compared to those normal to a large facade calculated to equate to the blast values for the vehicle-bomb classifications (ISO 16933:2007). 

  Classification criteria blast values (a)   Nominal standoffs (b) of approx. 100kg TNT for a small test frame Calculated nominal equivalents (c) to a large facade  
Classification Code  Pressure (kPa) Impulse (kPa-ms)   TNT equivalent size (kg) Standoff distance (m)
EXV45 (X) 30 180 45 30 32
EXV33 (X) 50 250 33 30 23
EXV25 (X) 80 380 25 40 19
EXV19 (X) 140 600 19 64 17
EXV15 (X) 250 850 15 80 14.4
EXV12 (X) 450 1200 12 100 12.4
EXV10 (X) 800 1600 10 125 11

 (b)  Derived from test measurements of reflected blast values on the face of vertical 3.15 × 3.15 m test frames
positioned at standoffs from 100 kg TNT equivalent charges placed 1.2 m above a hard surface to exceed the
classification criteria.

(c)  Calculated assuming hemispherical surface bursts on the ground at standoffs normal to the vertical face of
large facades.

Classification criteria for hand-carried satchel bombs (ISO 16933:2007). 

Classification Code (a) Mean peak air-blast pressure (kPa) Mean positive phase impulse (kPa-ms)
SB1 (X) 70 150
SB2 (X) 110 200
SB3 (X) 250 300
SB4 (X) 800 500
SB5 (X) 700 700
SB6 (X) 1600 1000
SB7 (X) 2800 1500

(a) In the classification code the letters, i.e. ‘SB’, refer to the type, i.e. a hand-carried satchel bomb, the number designates the standard blast and (X) denotes the hazard rating received during the test.  For example, classification SB4(C) applies to a test in which a standard blast having peak air-blast pressure of 800 kPa and positive phase impulse of 500 kPa- ms resulted in damage to the glazing resulting in hazard rating C.

Nominal charge sizes and standoff distances for typical test frames compared to those normal to a large facade calculated to equate to the blast values for the satchel bomb classifications (ISO 16933:2007).

  Classification criteria blast values (a)   Nominal standoffs (b) of approx. 100kg TNT for a small test frame    Calculated nominal equivalent (c) to a large facade  
Classification Code  Pressure (kPa) Impulse (kPa-ms)  TNT equivalent charge size (kg) Standoff distance (m) TNT equivalent charge size (kg) Standoff distance (m)
SB1 (X) 70 150 3 9 3.25 9.00
SB2 (X) 110 200 3 7 3.50 7.26
SB3 (X) 250 300 3 5 3.50 5.07
SB4 (X) 800 500 3 3 3.70 3.40
SB5 (X) 700 700 12 5.5 12.00 5.26
SB6 (X) 1600 1000 12 4 12.60 4.06
SB7(X) 2800 1500 20 4 21.00 4.00

(a)  See Table 11.

(b)  Derived from test measurements of reflected blast values on the face of vertical 2.4 × 2.4 m test frames
positioned at the standoffs listed from charges of TNT equivalent mass listed to exceed the classification
criteria. The charges were positioned at the distances above the hard surfaces as defined above.

(c)  Calculated assuming hemispherical surface bursts on the ground at standoffs normal to the vertical face of
large facades.

 

Hazard rating

Hazard-rating description

Definition

A

No break

The glazing is observed not to fracture and there is no visible damage to the glazing system.

B

No hazard

The glazing is observed to fracture but the inner, rear face leaf is fully retained in the facility test frame or glazing system frame with no breach and no material is lost from the interior surface. Outer leaves from the attack face may be sacrificed and may fall or be projected out.

C

Minimal hazard

The glazing is observed to fracture. Outer leaves from the attack face may be sacrificed and may fall or be projected out. The inner, rear face leaf shall be substantially retained, with the total length of tears plus the total length of pullout from the edge of the frame less than 50 % of the glazing sight perimeter.

Also, there are no more than three rateable perforations or indents anywhere in the witness panel and any fragments on the floor between 1 m and 3 m from the interior face of the specimen have a sum total united dimension of 250 mm or less. Glazing dust and slivers are not accounted for in the hazard rating.

If by design intent there is more than 50 % pullout but the glazing remains firmly anchored by purpose-designed fittings, a rating of C (minimal hazard) may be awarded, provided that the other fragment limitations are met. The survival condition and anchoring provisions shall be described in the test report.

D

Very low hazard

The glazing is observed to fracture and significant parts are located no further than 1 m behind the original location of the rear face. Parts be projected any distance from the attack face towards the blast source.

Also, there are no more than three rateable perforations or indents anywhere in the witness panel, and any fragments on the floor between 1 m and 3 m from the interior face of the specimen have a sum total united dimension of 250 mm or less. Glazing dust and slivers are not accounted for in the rating.

E

Low hazard

The glazing is observed to fracture, and glazing fragments or the whole of the glazing fall between 1 m and 3 m behind the interior face of the specimen and not more than 0.5 m above the floor at the vertical witness panel.

Also, there are 10 or fewer rateable perforations in the area of the vertical witness panel higher than 0.5 m above the floor and none of the perforations penetrate more than 12 mm.

F

High hazard

Glazing is observed to fracture and there are more than 10 rateable perforations in the area of the vertical witness panel higher than 0.5 m above the floor, or there are one or more perforations in the same witness panel area with fragment penetration more than 12 mm.

 

 

For our full range of technical specifications please click on relevant headings below;

Other Blast Specifications

GSA-TS01:2003     Standard Test Method for Glazing and Window Systems Subject to Dynamic Overpressure Loadings

EN 13541                   Glass in building - Security glazing - Testing and classification of resistance against explosion pressure 

EN 13123-2              Windows, doors and shutters - Explosion resistance - Requirements and classification

Fire Specifications

UL 10C           Positive Fire Pressure Tests of Door Assemblies 

EN 1363-1    Fire resistance tests –Part 1: General Requirements

EN 1364-1     Fire resistance tests for non-load-bearing elements – Part 1: Walls

BS 476 Part 22     Fire tests on building materials and structures

EN 1634-1   Fire resistance and smoke control tests for door and shutter assemblies, openable windows and elements of building hardware 

Attack Specifications

EN 1627                     Pedestrian door-sets, windows, curtain walling, grilles and shutters - Burglar resistance - Requirements and classification

LPS 1270                    Requirements & testing procedures for the LPCB approval & Listing of intruder resistant security glazing unit

LPS 1175                    Requirements and testing procedures for the LPCB certification and listing of intruder resistant building components, strongpoints, security enclosures and free-standing barriers

EN 356                         Glass in building - Security glazing - Testing and classification of resistance against manual attack.

Ballistic Specifications and Standards

EN 1063                     Glass in Building - Security Glazing - Testing and Classification of Resistance Against Bullet Attack

UL 752                         Standard for Bullet-Resisting Equipment

BS 5051                       Bullet-resistant glazing - Part 1:  for interior use- Part 2: for Exterior use

 

NIJ 0108.01             US National Institute of Justice Standard-Test and Certification for Ballistic Resistant Materials

EN 1522/3                Windows, doors, shutters and blinds - Bullet resistance - Requirements and classification / Test method

This is an extract not a full report and Architectural Armour Ltd accepts no liability for any loss, direct, indirect or consequential damage incurred by using this information, to the fullest extent permitted by law. You should make your own judgement as regards use of this document and seek out the full test standards.

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