Placard
A placard is a notice installed in a public place, like a small card, sign, or plaque.
A placard is posted on buildings to communicate a wide variety of information, such as fire safety policies, emergency shelters.
As part of the civil defense preparations in the event of a nuclear attack, in 1961 United States began establishing fallout shelters in communities across the country.
On existing buildings, where the connection is not visible from these places, it must clearly marked with a red and white sign, with "FDC", short for "Fire Department Connection", in 6 inches (150 mm) letters, with any other lettering or arrows being 2 inches (51 mm) tall.
The materials are prone to failure when exposed to flames, resulting in roof and floor collapses, spread of fire due to heat conduction in designs using metal.
[11] The states of Florida,[12] New Jersey,[13] New York,[11] Vermont,[14] and Mississippi;[15] along with the cities of San Francisco, CA,[16] Chesapeake, VA[17] and Acushnet, MA[17] have laws requiring posting of a truss warning placard on structures.
The firefighters had entered the structure and became disoriented and unable to escape the maze-like interior before multiple collapses occurred.
Following the disaster, the National Institute for Occupational Safety and Health recommended: Recommendation #10: Fire departments should identify dangerous vacant buildings by affixing warning placards to entrance doorways or other openings where fire fighters may enter.
[19][c] The signs are red and white, 24 inches (610 mm) square, mounted on the front and entrances to the structure, with the date it was posted.
[20][21] To provide useful information in planning operations, signs can have letter combinations added to identify known hazards.
[22] Road vehicles carrying dangerous goods in countries that follow the European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR), are required to display an orange plate on the front and rear of the vehicle.
[26] Placards are required on all four sides of any motor vehicles, rail cars, and shipping containers loaded with hazardous materials.
