1.3
USE OF MEASUREMENTS IN SPECIFICATIONS
Measurements in specifications shall be either in SI or I-P units as
indicated, except for soft metric measurements or as otherwise authorized.
When only SI or I-P measurements are specified for a product, the product
shall be procured in the specified units (SI or I-P) unless otherwise
authorized by the Contracting Officer. The Contractor shall be responsible
for all associated labor and materials when authorized to substitute one
system of units for another and for the final assembly and performance of
the specified work and/or products.
1.3.1
Hard Metric
A hard metric measurement is indicated by an SI value with no expressed
correlation to an I-P value. Hard metric measurements are often used for
field data such as distance from one point to another or distance above the
floor. Products are considered to be hard metric when they are
manufactured to metric dimensions or have an industry recognized metric
designation.
1.3.2
Soft Metric
a.
A soft metric measurement is indicated by an SI value which is a
mathematical conversion of the I-P value shown in parentheses
(e.g. 38.1 mm (1-1/2 inches)). Soft metric measurements are used
for measurements pertaining to products, test values, and other
situations where the I-P units are the standard for manufacture,
verification, or other controlling factor. The I-P value shall
govern while the metric measurement is provided for information.
b.
A soft metric measurement is also indicated for products that are
manufactured in industry designated metric dimensions but are
required by law to allow substitute I-P products. These
measurements are indicated by a manufacturing hard metric product
dimension followed by the substitute I-P equivalent value in
parentheses (e.g., 190 x 190 x 390 mm (7-5/8 x 7-5/8 x 15-5/8
inches)).
1.3.3
Neutral
A neutral measurement is indicated by an identifier which has no expressed
relation to either an SI or an I-P value (e.g., American Wire Gage (AWG)
which indicates thickness but in itself is neither SI nor I-P).
1.4
COORDINATION
Discrepancies, such as mismatches or product unavailability, arising from
use of both metric and non-metric measurements and discrepancies between
the measurements in the specifications and the measurements in the drawings
shall be brought to the attention of the Contracting Officer for resolution.
1.5
RELATIONSHIP TO SUBMITTALS
Submittals for Government approval or for information only shall cover the
SI or I-P products actually being furnished for the project. The
Contractor shall submit the required drawings and calculations in the same
units used in the contract documents describing the product or requirement
unless otherwise instructed or approved. The Contractor shall use ASTM SI
10 and ASTM E 621 as the basis for establishing metric measurements
SECTION 01415
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