This guide specification establishes the basis for
Contractor compliance with the specified metric
requirements and provides information necessary for
the Contractor and Government administrative
personnel to better understand the metric
requirements. This guide specification is to be
used in projects designated to use metric
measurements.
ASTM SI 10 and ASTM E 621 have been used to the
extent practicable in establishing the metric
measurements in guide specifications.
The following is an illustration of designer choices
for SI or I-P measurements:
SI MEASUREMENT
I-P MEASUREMENT
45 mm
1-3/4 inch
50.8 mm (2 inches)
2 inches
For the choices shown above, the metric measurement
of 45 mm is a hard metric value, and 50.8 mm (2
inches) is a soft metric value.
During the SPECSINTACT printing process two
automatic options are available:
1) For individual sections in the project either
all SI or all I-P units can be selected.
2) For all sections in the project either all SI or
all I-P units can be used.
A third option for a mix of SI and I-P units in a
section is not automatic and requires the removal of
the measurement tags and the unwanted requirements
on a case by case basis during the editing process.
**************************************************************************
This project includes metric units of measurements. The metric units used
are the International System of Units (SI) developed and maintained by the
General Conference on Weights and Measures (CGPM); the name International
System of Units and the international abbreviation SI were adopted by the
11th CGPM in 1960. A number of circumstances require that both metric SI
units and English inch-pound (I-P) units be included in a section of the
specifications. When both metric and I-P measurements are included, the
section may contain measurements for products that are manufactured to I-P
dimensions and then expressed in mathematically converted metric value
(soft metric) or, it may contain measurements for products that are
manufactured to an industry recognized rounded metric (hard metric)
dimensions but are allowed to be substituted by I-P products to comply with
the law. Dual measurements are also included to indicate industry and/or
Government standards, test values or other controlling factors, such as the
code requirements where I-P values are needed for clarity or to trace back
to the referenced standards, test values or codes.
SECTION 01415
Page 4
Previous Page
