Floor Rating 55 Definition

Sound transmission class stc is an integer rating of how well a building partition attenuates airborne sound in the usa it is widely used to rate interior partitions ceilings and floors doors windows and exterior wall configurations see astm international classification e413 and e90.

Floor rating 55 definition.

A f iic and f stc rating. The impact creates vibrations that travel through the flooring and produce sounds on the other side. The iic and stc is conducted at a controlled laboratory. 55 20132016 3 3 2 access box.

An approved secure box accessible by the ahj s master key or control containing entrance keys or other devices to gain access to a structure or area. An increase in building area aggregate floor area building height or number of stories of a structure. Ip rating is also known as ingress protection or international protection ratings are defined to the international standard of en 60529 british bs en 60529 1992. Ip 55 enclosure characteristics.

5000 2015 3 3 4 aerosol product. A uniform load rating on a beam can easily be translated into what an equivalent maximum point load can be. The international code council recommends that an acceptable level of performance for both stc and iic is 55 52 f iic. An enclosure below an elevated building even if it is the lowest floor for rating purposes cannot be counted as a floor to avoid classifying the building as low rise.

Protection from water up to water projected by a nozzle against enclosure from any direction. Protection from dirt dust oil and other non corrosive material. Available in aluminum carbon steel and stainless steel. Complete protection from contact with enclosed equipment.

High rise condominium buildings have 5 or more units and at least 3 floors excluding enclosure even if it is the lowest floor for rating purposes. The iic rating is the determined by using a standard tapping machine with five steel faced hammers to strike a test floor material generating sounds between 125 hz 4000 hz. If there s wall board covered ceiling suspended from the underside of that floor the dead load increases to about 10 pounds per square foot. The 55 inch category remains the most popular choice for tvs even though larger options are slowly but steadily gaining market share.

2019 was a good year for tvs as the models we have tested were better than their 2018 counterparts. A typical wood frame floor covered with carpet or vinyl flooring has a dead load of about 8 pounds per square foot. The preferred level of performance for stc and iic is 60 57 f iic. For example a floor joist at 16 spacing s that can carry 53 pounds per linear foot would translate into a 318 pound single point load at its center.

The dead load on a floor is determined by the materials used in the floor s construction.