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2. Noise reduction coefficient - Wikipedia

   en.wikipedia.org/wiki/Noise_reduction_coefficient

   This is more conceptual than physically achievable: even very thick concrete walls will attenuate sound and may have an NRC of 0.05. Conversely, an NRC of 1.0 indicates that the material provides an acoustic surface area (in units sabin) that is equivalent to its physical, two-dimensional surface area. [ 1 ]

3. Sound reduction index - Wikipedia

   en.wikipedia.org/wiki/Sound_Reduction_Index

   The Sound Reduction Index is expressed in decibels (dB). It is the weighted sound reduction index for a partition or single component only. This is a laboratory-only measurement, which uses knowledge of the relative sizes of the rooms in the test suite, and the reverberation time in the receiving room, and the known level of noise which can pass between the rooms in the suite by other routes ...

4. Precast concrete lifting anchor system - Wikipedia

   en.wikipedia.org/wiki/Precast_concrete_lifting...

   Fig 1: Load resistance elements of an anchor system in a wall panel Fig 2: Lifting system model for a thin section wall panel The rigging arrangements can influence the applied anchor load , where statically indeterminate systems are not necessarily a design consideration, but can be used in practice.

5. Cladding (construction) - Wikipedia

   en.wikipedia.org/wiki/Cladding_(construction)

   Between the cladding and the wall there is a cavity where rain can run down. In the event of a fire this draws hot air up like a chimney, intensifies the fire, and spreads it to the top of the clad area. The fire can then get inside the building through open windows, for example to curtains blowing through windows.

6. Wall panel - Wikipedia

   en.wikipedia.org/wiki/Wall_panel

   A wall panel is single piece of material, usually flat and cut into a rectangular shape, that serves as the visible and exposed covering for a wall. Wall panels are functional as well as decorative, providing insulation and soundproofing , combined with uniformity of appearance, along with some measure of durability or ease of replaceability.

7. Autoclaved aerated concrete - Wikipedia

   en.wikipedia.org/wiki/Autoclaved_aerated_concrete

   Accuracy: Panels and blocks made of autoclaved aerated concrete are produced to the exact sizes needed before leaving the factory. There is less need for on-site trimming. Since the blocks and panels fit so well together, there is less use of finishing materials such as mortar.