may be best designed before solicitation. Such
projects would include applications where the design
conditions are beyond the capabilities of commercial
software available from SRW suppliers, or
applications where the Contractor could not be
expected to bid without performing stability
calculations during the bidding process. Examples
may include bin walls, or structures with unusual
loading applications, such as coastal structures,
blast resistant structures, or structures in seismic
zone 4.
(3) Hybrid Design. Much of the civil works Corps of
Engineers projects involve conditions where the
global stability requires analysis, but the
internal, external and compound stability are
routine. Such conditions are common on water front
structures. Contractor analysis of global stability
is not biddable since the analysis may indicate
structure definition that could not be assumed
during bid. While this could be handled though a
modification to the contract, there is a risk that
it will be overlooked.
Also, experience has shown
that it is difficult to specify the degree of work
involved in the design analysis (the reason
architect-engineer services are negotiated in
accordance with the Federal Acquisition Regulation,
Part 36). The hybrid design incorporates the
advantages of the Contractor designed wall for
internal, external and compound stability, while
eliminating the conflict of interest in requiring
Contractor design of global stability. Changes made
to the wall during preparation of shop drawings,
such as free standing height, footing embedment, or
location could affect the global stability. If the
hybrid design method is used, the submittal process
should assure that the wall designer reviews the
shop drawing submittals, regardless of a Contractor
design check for global stability.
**************************************************************************
PART 1
GENERAL
**************************************************************************
NOTE: This section does not address requirements
for dewatering, shoring, or earthwork below
foundation level.
Geometric requirements such as wall height, length,
and construction limits should be shown on the
drawings.
Notes before paragraphs are provided to present
assumptions in preparation of the guide
specification, make suggestions for conditions that
warrant revisions, and provide background technical
information or references for further information.
They should be consulted prior to revising wording
SECTION 02832
Page 4
Previous Page
