CEMP-E
TI 809-28
15 September 1999
a. Geotechnical considerations for RRMS foundations are covered in TM 5-818-7,
CESWD-ED-TS/G Criteria Letter, and CESWD Architectural and Engineering Instruction
Manual.
b. RRMS is a specialized procedure and must be targeted to address specific design
requirements, including such items as specific site, structural, architectural, economical, and
other project-specific requirements. RRMS must be considered when the following situations
exist:
(1) A requirement for a high degree of structural continuity and ability to resist
subgrade movement.
(2) Expansive subgrade at the site.
(3) Suitable stratum for founding alternate foundation types is not present at a
reasonable depth.
(4) RRMS is readily adaptable to the structural and/or architectural system of the
proposed project.
(5) Structures with uniform loads and repetitively spaced columns and walls.
(6) Structures with deformation sensitive architectural finishes.
(7) Alternate foundation types are not as economical, constructible, or would not
produce equal or better performance.
c. Generally, RRMS should not be used in the following situations where:
(1) Continuity and level of performance is not required.
(2) RRMS is not reasonably adaptable to the structural and/or architectural system.
(3) Site topography and/or subsequent site development create large fill differential.
(4) Floor elevations vary due to depressed pits, channels, partial basements or other
split level arrangements.
(5) There are large open functional areas without interior loaded columns.
(6) There are widely spaced and/or very heavily loaded column and/or wall loads.
(7) More constructible and/or economical foundation types will produce equal or
better performance.
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