MIL-HDBK-1110
From a practical standpoint, it is easier to specify a
paint's wet film thickness than its spreading rate.
o) Procedure 15: Retroreflectivity of Pavement
Markings. Measure the retroreflectivity of airfield markings for
conformance to contract specification using a Mirolux 12 or
Erickson instrument. In addition to following the instrument
manufacturer's instructions, these precautions should be taken:
(1)
Keep an extra fully charged battery available.
(2)
Frequently check instrument calibration.
(3) Systematically make five measurements across
stripes at each test site rather than in the direction of or
opposite to application to avoid directional effects.
(4) Select numerous random test areas to obtain
representative measurements.
Use of a portable computer while making
retroreflectivity measurements can greatly accelerate the
procedure. This is especially important on busy runways with
limited access time. Typically, a two-person team has a driver
who stays in the vehicle keeping radio contact with the tower,
recording data into the computer and driving to the different
test locations. The other team member measures
retroreflectivities and calls out the data to the driver.
5.20.2
Alternative Markings. A variety of tapes, buttons, and
reflectorized squares have been successfully used to mark
roadways. Tapes have been used at military installations to
provide temporary markings. They may be damaged by turning
wheels of heavy trucks. None of these alternative marking
materials are recommended for use on runways because of concern
for foreign object damage.
5.21
Wooden Floors. The surface preparation (scraping and
sanding) and coating of wooden floors is described in NFGS-09900
and CEGS 09900. These finishes include stains and alkyd and
moisture-curing coating systems. For hardwood floors for
gymnasium-type use, a selection can be made from the MFMA Heavy
Duty and Gymnasium Finishes for Maple, Beech and Birch Finishes.
The products addressed include sealers, heavy-duty finishes,
gymnasium-type finishes, moisture-cured urethane finishes, and
water-based finishes. The individual suppliers should be
contacted for special applications such as handball and
racquetball.
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