GB 50949-2013Construction code for sound reinforcement system (English PDF)

1.0.2 This standard applies to the construction of the fixed installation sound

reinforcement system of such buildings as all kinds of newly built, extended, and reconstructed halls, stadiums and so on.

1.0.3 The sound reinforcement system engineering construction shall be in accordance with the work drawing design documents as approved.

1.0.4 The construction of sound reinforcement system engineering shall, in addition to this code, also comply with the current relevant national standards.

2.0.1 Sound reinforcement system

The system converting the sound signal into electrical signal, then converting it back into the sound environment system as served by the sound signal through amplification, processing, and transmission, including device and sound field.

2.0.2 Sound control room

The technology room used to operate and control the sound reinforcement system devices, which is shortly referred to as the sound control room.

2.0.3 Power amplifier room

The technology room to accommodate the power amplifier of the sound reinforcement system.

2.0.4 Grounding

A dedicated grounding wire system to prevent interference from external electromagnetic fields.

2.0.5 Reference materials of programme source

3.2 Preparing for construction

3.2.1 Construction site shall meet the following requirements.

1 The obstacles at the work site are removed, the environment shall be clean;

2 The reserved openings, the laid pipelines, cable trenches, and embedded parts shall comply with the design requirements;

3 The installation position, reservation conditions, and load, etc., of the speaker system shall comply with the design requirements;

4 The construction site power supply shall comply with the relevant provisions of the current national standard "Safety code of power supply and consumption for installation construction engineering" GB 50194.

3.2.2 Construction preparation shall include the following requirements.

1 Work drawings, construction program and related construction materials shall be complete;

2 It shall make technical disclosure and safety education for the construction workers;

3 It shall develop engineering construction safeguard measures;

4 Construction device, machinery and tools, etc., shall be all available, AND delivered to the designated areas at the construction site for centralized storage.

3.2.3 The device and materials mobilized into site shall be inspected in accordance with the following requirements.

1 It shall make counting and classification in accordance with the device and material list of the engineering contract;

2 The unpacking inspection shall neither damage device nor materials.

3 Device name, model, specification, quantity, origin, etc., shall meet the design requirements, the appearance shall be intact;

4 The product certification, instruction manual, accessories and related technical information shall be complete;

5 It shall make power on inspection for the device which requires power on inspection, AND make phase inspection for the speaker system.

3.3.2 The installation of all kinds of junction box shall be installed flatly and firmly, the cover plate is opened and closed flexibly, the shape and surface shall be intact.

3.3.3 The connection between the junction box and embedded pipe opening shall be made by the use of pipe protective opening and metal lock, it is not allowed for welding.

3.4 Cable laying

3.4.1 The wiring in conduit shall comply with the following requirements.

1 The diameter size of the conduit for cable laying shall comply with the design requirements;

2 It shall check whether the pipeline is smooth before wiring, whether the pull line or tie line is placed in...