Appendix
UFC 3-300-10N
May 2005
Including Change 2, August 2006
APPENDIX B BEST PRACTICES
B-1
SELECTION OF STRUCTURAL SYSTEMS. Consider logical alternatives
for the foundations and for the framing systems when selecting the structural system.
The following factors should be considered:
a. Total Life Cycle cost effectiveness of the structural system (the design life
of the facility, and the maintenance costs over this period)
b. Constructability
c. Experience level and availability of local contractors and labor force
d. Availability of materials at the project location
e. Experience of inspection personnel
f. Construction schedule and methods
g. Site environment, including accessibility, climate, seismic hazard,
subsurface conditions, and wind velocity
B-2
SYSTEMS BEST PRACTICES.
B-2.1
General.
Construction Adjustments: Where building finishes or other building features that are
supported by structural elements require close construction tolerances, attachments to
the structural elements should be detailed such that adjustments may be made in the
field to compensate for lack of correct fit.
B-2.2
Concrete.
B-2.2.1
All concrete should have a specified compressive strength (f'c) of not less
than 20 Mpa (3,000 psi) at 28 days.
B-2.2.2
With the exception of floor slabs in aircraft hangars and heavy industrial
facilities where the slab is designed as a rigid pavement, concrete floor slabs on ground
should be reinforced and have a thickness of not less than 101mm (4 inches). Minimum
reinforcing should be #3 reinforcing bars at 406mm (16") on center or 152x152 -
MW18.7xMW18.7 (6x6-W2.9xW2.9) welded wire reinforcing. The slab reinforcing
should be placed on firm supports approximately 1/3 the slab depth from the top of slab
with a minimum cover of 38mm (1-1/2 inches).
B-2.2.3
Concrete wall and column footings should have a minimum thickness of
305mm (12 inches), and a minimum width of 457mm (18 inches).
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