A placard is a notice installed in a public place, like a small card, Signage, or plaque. It can be attached to or hung from a vehicle or building to indicate information about the vehicle operator or contents of a vehicle or building. It can also refer to paperboard signs or notice carried by Picketing or demonstrators.
The International Building Code requires doors in some public and commercial structures, fitted with an internal key lock have a notice "This door to remain unlocked when this space is occupied" in a minimum of text be posted beside or above the door. Some state and local building codes modify this text, such as California fire code, which specifies "This door to remain unlocked during business hours".
Temporary placards may be placed on buildings such as warning signs when a structure is being fumigation, or has been condemned by building inspectors or the fire department and is unsafe to enter.
In 1962, 1.4 million metal signs and 1 million adhesive stickers were manufactured and distributed across the country at a total cost of $700,500 . Two standard signs were used widely, a aluminum sign for posting on the exterior of buildings identifying the building as having a fallout shelter, and a steel sign, intended for interior use to the shelter's location and mark the actual location of the shelter within the building.
The sign system included "overlays" that were designed to be added to signs for conveying additional information about the specific shelter and its location.
Exterior sign overlays:
Interior sign overlays:
Alternate languages overlays in Spanish language in areas where it was widely spoken and Samoan language for use on American Samoa.
Following the ending of funding for fallout shelters in the late 1970s. Following the end of the program there was no organized effort by the federal government reclaim shelter supplies and signage, resulting in most shelters being abandoned in situ until building owners cleared away the shelter's supplies and signage during subsequent renovations or demolition projects. In 2017, New York City announced a formal project to go through all city-owned structures and remove any remaining fallout shelter signage, citing the fact no structure still had a functioning shelter and would not be usable in an emergency.
If a fire alarm system does not automatically call the fire department, a "When Alarm Sounds - Call Fire Department" sign must be posted at all fire alarm pull station/call points and at any external fire alarm notification appliances.
The square is divided into four sections, color coded: Red - flammability; blue - health hazard; yellow - reactivity/instability; White - special hazard, such as oxidizers, water reactive or Asphyxiant gas.
The red, yellow and blue sections are labeled on scale of 0 to 4; 0 "minimal hazard" to 4, "severe hazard". White (special hazard) is represented by letter codes ("OX","SA", a "W" with a line through it).
The standard utilizes the ISO's "running man" symbol for exit signage, similar to international standards, along with the ISO 7010 symbols for Fire alarm call point, fire extinguisher and fire hose reel. The standard also provides symbols for marking standpipe connectors and identifying what the standpipe connection supplies water to: fire sprinkler systems, standpipes or both.
The standard also contains symbols for informing for enforcing fire safety rules, such as prohibiting cooking, smoking, hanging of items from fire sprinklers, and use of elevators in evacuations.
In 2006, the International Code Council's International Fire Code introduced a marking system to help firefighters identify abandoned, vacant or unsafe structures and hazards posed by them. The system was devised from system used by the New York City Fire Department, recommended by NIOSH in the Worcester report, with modifications to color and sign dimensions. The signs are red and white, square, mounted on the front and entrances to the structure, with the date it was posted.
To provide useful information in planning operations, signs can have letter combinations added to identify known hazards.
Class 7 - Category III |
Materials on Table 2, which is all other hazardous materials not in Table 1, must display placard if or more of the material is loaded into a vehicle. If or less of a Table 2 material is loaded onto the vehicle, the placard is optional.
Placards are required on all four sides of any motor vehicles, rail cars, and shipping containers loaded with hazardous materials. It must be attached upright, securely, kept in good condition, not obstructed by ladders, pipes or tarpaulins. It must be located at least from other markings that could reduce its effectiveness.
The law also prohibits the display of placards on vehicles that are not loaded with the hazardous material listed on the placard, placards that do not meet design guidelines in § 172.519 General specifications for placards, or displaying advertising and slogans in a design or manner that could be confused for a placard.
In computer graphical user interfaces, a placard is a rectangular area of a window meant for displaying information to the user.
In the Habsburg Netherlands (1482–1794) and the Dutch Republic (1581–1795) laws were often known as "Placards" () after their form of publication by way of a placard that was nailed to a wall in a public place. An important example is the Dutch declaration of independence of 1581, known in Dutch as Plakkaat van Verlatinghe.
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