MIL-HDBK-1027/4A
4.2.2.15 Acoustical Control. A Noise Level Reduction (NLR) minimum factor
of 30 is required in the 70-75 DNL zone and an NLR minimum factor of 25 is
required in the 65-70 DNL zone. There are no special requirements in the DNL
zone below 65.
Conform to noise and sound transmission criteria cited in DM 1.03.
Prevent sound transmission over walls. Acoustic absorbing material should be
fire and smoke rated as required in MIL-HDBK-1008C.
4.2.3
Landscape Architecture. The framework for planning and design of
all landscape architectural elements is found in the activity Master Plan and
more specifically in the Base Exterior Architecture Plan (BEAP). General
guidance for all design elements can be found in NAVFAC P-960. Landscape
design must enhance positive image for the facility and should direct
pedestrians to a primary entry. Design for minimal maintenance. Provide
landscape fabric for weed prevention. Select hardy specimen species
indigenous to the area. Locate hose bibbs convenient for additional
irrigation.
Outdoor pedestrian-oriented spaces are often useful for building
entry plazas, for break and lunch areas, and to provide pleasant views from
the building interior. Design outdoor areas to harmonize with the
architectural and natural site character of their surroundings, but to also
moderate environmental and climatic extremes, such as noise, sun, wind and
seasonal precipitations.
4.2.3.1
Site Analysis and Development Concept. If the analysis and
development is successful, the biological integrity of the site will be
retained or improved, while successfully meeting the program needs of the
user in a comfortable, attractive and functional setting. Minimize clearing
of existing vegetation and avoid excessive grading.
4.2.3.2
Planting. Guidance for planting design is provided in NAVFAC P-
905. Plantings can provide a pleasant setting and visual asset, and minimize
the environmental impact of development. The following is a list of minimum
guidelines to be considered in implementing new planting schemes for the
facility:
a) Preserve Existing Vegetation. Existing mature stands of trees
or other significant vegetation are to be preserved and enhanced, where
possible.
b) Select Indigenous Plant Materials.
Plant materials chosen will
be indigenous to the site.
c)
Design for Minimum Maintenance.
d) Define Space and Screen Conflicting Uses. Select plant
material to define space and screen visually conflicting uses, where
appropriate. See section on screens and walls below.
e) Promote Energy Conservation. Plant materials are to be used to
reduce energy requirements, where possible, such as shading with deciduous
trees. Enhance any desirable climatic effects, such as clear areas at large
glass areas oriented for winter sun heat gain.
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