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Tractors, machinery for agricultural and forestry, powered lawn and garden equipment -- Safety signs and hazard pictorials -- General principles
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgASAE ANSI/ASABE AD11684:1995 April 2011
Keywords: Decals, Labels, Safety, Signs
0.1 ANSI/ASABE AD11684:1995, Tractors, machinery for agricultural and forestry, powered lawn and garden equipment - Safety signs and hazard pictorials - General principles, is an adoption with deviations of the identically titled ISO standard ISO 11684:1995, Tractors, machinery for agricultural and forestry, powered lawn and garden equipment - Safety signs and hazard pictorials - General principles. Deviations noted in the following Forward sections pertain to those provisions where harmonization could not be achieved between ASABE and the International Standard.
0.2 ANSI/ASABE AD11684:1995 establishes general principles for the design and application of safety signs and hazard pictorials permanently affixed to tractors, machinery for agriculture, and powered lawn and garden equipment. This standard outlines safety sign objectives, describes the basic sign formats and colours and provides guidance on developing the various panels that together constitute a safety sign. The scope is identical to the ISO standards scope except as follows:
0.2.1 Deletion of "and forestry" and "as defined in ISO 3339-0 and ISO 5395" from section 1 Scope.
0.3 Two Normative references are listed in ISO 11684:1995. The responsible ASABE committee has reviewed these references and approved the following deviation:
0.3.1 Remove ISO 3339-0:1986, Tractors and machinery for agriculture and forestry - Part 0: Classification system and classification
0.4 This standard has been approved as an American National Standard by ANSI (American National Standards Institute). Substantial content of the original ISO 11684 was based on ASAE S441.
0.5 ASABE technical deviations from ISO 11684:1995:
0.5.1 Add section 4.3:
4.3 Expected life and maintenance
4.3.1 A safety sign is considered permanent if, when viewed at distances described in section 5.9, the sign has good color and legibility after exposure tests for weatherability at a latitude of 25° to 35° North on a surface inclined at 45º facing south for a period of at least two years.
4.3.2 Instructions shall be provided in the operator's manual regarding the maintenance and replacement of safety signs.
0.5.2 Add section 5.9:
5.9 Letter style and size
5.9.1 Letter Style
184.108.40.206 Signal words shall be upper case sans serif letters.
220.127.116.11 Message panel lettering shall be sans serif. Letters may be in upper case only or in combinations of upper case and lower case as deemed appropriate.
18.104.22.168 The font may be one of the following or a font with similar legibility: Arial, Arial Bold, Helvetica, Helvetica Bold, Folio Medium, Franklin Gothic, Futura, News Gothic Bold, Meta Bold, or Univers.
5.9.2 Letter size
22.214.171.124 Lettering shall be of a size that enables a person with normal vision, including corrected vision, to read the safety sign at a safe viewing distance from the hazard.
126.96.36.199 Safe viewing distance for the signal word shall take into consideration a reasonable hazard avoidance reaction time.
188.8.131.52 Safe viewing distance for the message panel wording may be different from the safe viewing distance for the signal word.
184.108.40.206 Signal word letter height should be at least 50% greater than the selected height of the message panel wording.
220.127.116.11 Minimum word letter height shall be not less than 6 mm for a signal panel word nor less than 3 mm for a message panel word (upper case letters).
0.5.3 Add section 10.6:
Specified colors for use on safety signs are to be approximately as follows:
Color Reference Munsell Number
Black N2.0/ or lower
White N9.0/ or higher
Text of ISO 11684:1995, Tractors, machinery for agricultural and forestry, powered lawn and garden equipment -- Safety signs and hazard pictorials -- General principles, follows.
This International Standard establishes general principles for the design and application of safety signs and hazard pictorials permanently affixed to tractors, machinery for agriculture and forestry, and powered lawn and garden equipment as defined in ISO 3339-O and ISO 5395. This International Standard outlines safety sign objectives, describes the basic safety sign formats and colours, and provides guidance on developing the various panels that together constitute a safety sign.(Download PDF) (Export to EndNotes)