GA/T 824-2019Specifications for comstruction of firearms examination laboratory in Forensics (English PDF)

4.1 Building Requirements for Gun Elasticity Inspection Room

4.1.1 Use area

Not less than 40 square meters, the length of the rectangular structure is not less than 8m, the width should be not less than 5m, and the net floor height is not less than 3.5m.

4.1.2 Door

It should have sound insulation, fire prevention and bulletproof functions.

4.1.3 Ceiling protection structure

Should be sturdy, with shock, fire, sound absorption and anti-bouncing functions. Decoration materials meet the regulations in Chapter 2 and 3.2 of GB 50222-1995 the fire rating is not lower than B1 in Appendix A. Police pistols, 79-type mini submachine guns, non-standard guns at the muzzle and the point of impact when the firing angle is not less than 5m and the firing angle is 30 ° ~ 90 °, the fire should not bounce when hitting the ceiling.

4.1.4 Floor

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It should have fire prevention and anti-bouncing functions. Decoration materials meet the requirements of Chapter 2 and 3.2 of GB 50222-1995, and the fire rating is not lower than Level B1 in Appendix A. Police pistol, 79-type mini submachine gun, non-standard firearms at a distance of not less than 5m at the muzzle and the point of impact, firing angle in the case of 30 ° ~ 90 °, the fire should not bounce when it hits the floor.

4.1.5 Sound insulation

The walls around the room should have sound absorption. The environmental noise limit shall comply with the Class 1 acoustic environmental function in Table 1 of 5.1 of GB 3096-2008 the area regulations and the sudden noise regulations in 5.4, the outdoor noise caused by gunfire should be less than 70dB.

4.1.6 Wall in shooting direction

It shall have the functions of fire prevention, anti-bouncing and anti-penetration. Decoration materials meet the requirements of Chapter 2 and 3.2 of GB 50222-1995, fireproof the rating is not lower than B1 in Appendix A. Police pistols, 79-type miniature assault rifles, non-standard firearms are not less than 5m from the muzzle point.

When the firing angle is 30 ° ~ 90 °, the fire should not bounce when hitting the wall.

4.1.7 Ventilation

Equipped with a strong smoke exhaust device to ensure that gunpowder smoke produced by guns can be quickly discharged to the outside, and fresh fresh air is guaranteed.

Requires no less than 20 ventilations.

4.1.8 Temperature

The indoor temperature should be controlled between 16 °C ~ 28 °C.

4.1.9 Humidity

The indoor humidity should be controlled below 65%.

4.1.10 Lighting

The indoor adopts embedded grille fluorescent lamps or other lighting fixtures and emergency lighting devices, according to Table 5.5.1 in 5.5.1 of GB 50034-2013 the minimum illumination is not less than 500 Lux.

4.1.11 Water supply and drainage

The water inlet and overflow pipes should be set according to the equipment conditions to ensure that the water inlet and drainage are smooth and reliable. The overflow flow should be greater than the inlet flow.

4.1.12 Communication

Intercom equipment or emergency call equipment should be installed to achieve barrier-free communication inside and outside the laboratory.

4.1.13 Fire safety

Fire alarms should be installed, and sufficient fire extinguishers or other fire-fighting equipment should be provided according to the size of the area used;

Comply with the requirements for classification and fire resistance of 5.1 civil buildings in GB 50016-2014, and the decoration materials should meet the internal decoration of common buildings in Appendix B Classification of material combustion performance. The fire protection level should not be lower than the B1 level in A of Appendix of GB 50222-1995.

4.1.14 Anti-small animal entry device

Air ducts, fresh air vents, water pipes, door bottoms and other parts shall be provided with anti-arthropod and rodent entry devices.

4.1.15 New air outlet

It should be installed in a clean area above the indoor suspended ceiling and free of pollution sources around. It should be provided with protective facilities and should not be in the same direction as the exhaust vent.

The size of the new air outlet is determined according to the design requirements.

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4.2 Environmental requirements

The gun elastic energy inspection room should be built on the first floor (ground floor). When it is built above the first floor, it should be done on the ground according to the structure and equipment of the house.

Load-bearing processing.

4.3 Laboratory equipment configuration requirements

4.3.1 The elasticity inspection room of ordinary dangerous guns shall be equipped with the following main equipment.

a) Dangerous firearm shooting rack;

b) warhead collector;

c) projectile velocimeter;

d) Mobile bullet-proof shooting observation device.

4.3.2 The elasticity inspection room of a shotgun is to be equipped with the following main equipment.

a) Shotgun shell speed measurement system;

b) Shotgun water collector;

c) Remote shotgun distribution tester;

d) Mobile bullet-proof shooting observation device.

5.1 Acceptance of Gun Elasticity Laboratory Building

5.1.1 Use area

Use a rangefinder to measure and determine whether the results meet the requirements of 4.1.1.

5.1.2 Door

Consult the material qualification documents, compare the design drawing requirements, and determine whether the results meet the requirements of 4.1.2.

5.1.3 Ceiling

Check the qualified documents of the materials, compare the requirements of the design drawings, and determine whether the results meet the requirements of 4.1.3 anti-bouncing function. press the acceptance method of B1 grade materials in Appendix A of GB 50222-1995 determines whether the results meet the requirements of 4.1.3 fire rating.

5.1.4 Floor

Check the qualified documents of the materials, compare the requirements of the design drawings, and determine whether the results meet the requirements of 4.1.4 Anti-Bouncing Function. press the acceptance method of B1 grade materials in Appendix A of GB 50222-1995 determines whether the result meets the requirements of 4.1.4 fire rating.

5.1.5 Sound insulation

The noise tester is used for testing, and it is tested according to the methods 6.1 and 6.2 in GB 3096-2008 to determine whether the results meet the requirements of 4.1.5.

5.1.6 Wall in shooting direction

Check the qualified documents of the materials, compare the requirements of the design drawings, and determine whether the results meet the requirements of 4.1.6 Anti-Bouncing Function. press the acceptance method of B1 grade materials in Appendix A of GB 50222-1995 determines whether the result meets the requirements of 4.1.6 fire rating.

5.1.7 Ventilation

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According to the calculation of the exhaust air volume of the exhaust equipment and the site environment, it is determined whether the result meets the requirements of 4.1.7.

5.1.8 Temperature

After the air-conditioning system runs for 30 minutes, it is.200mm downward from the air outlet and tested with a thermometer to determine whether the results meet 4.1.8 Claim.

5.1.9 Humidity

Use a hygrometer to determine whether the results meet the requirements of 4.1.9.

5.1.10 Lighting

Use an illuminance meter to determine whether the results meet the requirements of 4.1.10.

5.1.11 Water supply and drainage

Water injection experiments are performed on the pipeline to determine whether the results meet the requirements of 4.1.11.

5.1.12 Communication

Accept the technical standards of the product and determine whether the results meet the requirements of 4.1.12.

5.1.13 Fire safety

According to the classification of the combustion performance grades of building interior decoration materials in Appendix B of GB 50222-1995, and the acceptance method of B1 grade materials in Appendix A, the result of the determination is whether it meets the requirements of 4.1.13 fire rating.

5.1.14 Anti-small animal entry device

Visual inspection to determine whether the results meet the requirements of 4.1.14.

5.1.15 New air outlet

Based on the design drawing requirements, determine whether the results meet the requirements of 4.1.15.

5.2 Acceptance of environmental requirements

Visual inspection to determine whether the results meet the requirements of 4.2.

5.3 Acceptance of laboratory equipment configuration

5.3.1 Visual inspection to determine whether the results meet the requirements of 4.3.1.

5.3.2 Visual inspection to determine whether the results meet the requirements of 4.3.2.

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Appendix A

(Informative appendix) Schematic A.1 The schematic diagram of the elastic energy inspection room of ordinary dangerous gun is shown in Figure 1.

Figure A.1 Schematic diagram of the elastic energy inspection room of ordinary dangerous guns

A.2 The schematic diagram of the elastic energy inspection room for shotguns is shown in Figure A.2.

Figure A.2 Schematic diagram of the elastic energy inspection chamber of a shotgun danger gun

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A.3 The schematic diagram of the overall bullet laboratory structure is shown in Figure A.3.

Figure A.3 Schematic diagram of the overall bullet laboratory