Fireplace Installation

Continued

Hearth Extension

A hearth extension projecting a minimum of 20" in front of and a minimum of 12" beyond each side of the fireplace opening is required to protect combustible floor construction in front of the fire- place. Fabricate a hearth extension using a material which meets the following specifications: a layer of noncombustible, inorganic material having a thermal conductivity of K=0.84 BTU IN/FT, HR. F (or less) at 1" thick. For example, if the material selected has a K factor of 0.25, such as glass fiber, the following formula would apply:

0.25x 1.0" = 0.30" thickness required

Thermal conductivity "K" of materials can be obtained from the manufacturer or supplier of the noncombustible material. If the hearth extension is to be covered, use noncombustible material such as tile, slate, brick, concrete, metal, glass, marble, stone, etc. Provide a means to prevent the hearth extension from shifting and seal gap between the fireplace frame and hearth extension with a non- combustible material (see Figure 3).

WARNING: Hearth extension

is to be installed only as shown

in Figure 3.

Seal Gap

Fireplace Front

Mantels

A mantel may be installed if desired (see Figure 4). Woodwork such as wood trims, mantels or any other combustible material projecting from the front face must not be placed within 12" of the fireplace open- ing. Combustible materials above 12" and projecting more than 1 1/2" from the fireplace must not be placed less than 15" from the top opening of the fireplace (NFPA STD 211, Sec. 7-3.3.3).

Mantels or any other combustible material also may come up to the side edge of the black metal face of the fireplace just as long as the projection from the front face fall within the limit shown in Figure 4.

 

 

Combustible

 

12 1/4" Ref.

Material

 

 

Safe

6"

 

Zone for

Ref.

33°

Projection of

 

Combustible

 

 

 

3" Nom.

Materials

 

 

11/2" Max.

15" Min.

12" Min.

Upper

 

Section of

Fireplace

Fireplace

Opening

Ember Protector

Fireplace Front

Raised Hearth

Ember Protector

Fireplace Front

Elevated

Ember Protector

Top View of Fireplace

 

 

FIREBOX

 

7.75"

 

 

 

3" Max.

Hearth

SAFE ZONE

4.5"

 

Extension

33°

 

Seal Gap

Min. to

Combustible

 

 

Perpendicular

 

Material Must

 

Side Wall

 

Not Overlap

 

12"

 

Front Face

 

 

Figure 3 - Hearth Extension

Figure 4 - Mantel Clearances to

Combustible Material

116010-01Cwww.desatech.com

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Desa (V)G36HR, (V)G36R installation manual Hearth Extension, Mantels
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(V)G36HR, (V)G36H, (V)G36R, (V)G36 specifications

The Desa (V)G36R, (V)G36HR, (V)G36, and (V)G36H are modern lightweight modular assault rifles designed for versatility and reliability in various tactical situations. These firearms, part of the G36 family, are renowned for their innovative engineering and performance capabilities, making them suitable for military, law enforcement, and civilian use.

One of the main features of the G36 series is its modular design, which allows for easy configuration and customization. Users can adapt the rifle according to specific mission requirements, attaching different optics, grips, and accessories. The interchangeable components ensure that operators can switch between different configurations effortlessly, enhancing user adaptability in the field.

The (V)G36R is particularly notable for its reflex sight mounting on the receiver, allowing for rapid target acquisition. It features a lightweight polymer body, which significantly reduces fatigue during prolonged use. The rifle is chambered in 5.56x45mm NATO, providing a perfect balance of power and controllability. Its adjustable stock enables operators to tailor the length of pull to suit individual preferences.

The (V)G36HR variant focuses on enhanced accuracy and range, equipped with a longer barrel and precision-engineered barrel stabilizers. This version is designed for marksmen who require the ability to engage targets at extended distances with superior accuracy, making it an excellent choice for designated marksman roles.

The standard (V)G36 offers a reliable and rugged platform, featuring a rotating bolt and short-stroke gas piston system. This gas-operated mechanism reduces recoil and improves reliability, even in adverse conditions. The rifle's high-capacity magazines hold 30 rounds, allowing for sustained fire without frequent reloading.

Finally, the (V)G36H variant provides added versatility with integrated rail systems for mounting tactical accessories. This feature enhances situational awareness and allows for the integration of various aiming solutions, including night vision devices and laser aiming modules.

Overall, the Desa G36 series stands out due to its lightweight construction, modular design, and adaptability. These rifles combine cutting-edge technology with user-centric features, making them effective tools for today's combat environments. Whether used in urban warfare or rural settings, the G36 family delivers exceptional performance and reliability, catering to the diverse needs of modern operators.
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