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Unformatted text preview: struction and then “turns the key” to the
owner on completion, for a previously agreed price.
2. Design-build-lease and build-operate-transfer (BOT) /
“design-build-lease-to-operate”: Extensions of turnkey. The
owner delays capitalizing the project permanently or to some
3. Bridging: Traditional owner/designer relationships followed by
competitive proposals by design-build contractors to complete
documents and execute construction.
4. Subcontractor design-build: A trade or specialty contractor
performs both design and installation of particular systems such
as HVAC, curtain wall, or roofing. 12 • Major reasons owners selected DB (Pros):
– Single point of responsibility
– Shorten duration
– Cost reduction
– Enhanced constructability / innovation
– Earlier known cost and schedule
– Reduced disputes involving contract interpretation, design
clarifications, RFIs and coordination issues
– Reduced claims
– Support large project size / complexity
– Allow phased and fast-track construction 13 Phased and Fast-Track Construction 14 Phased and Fast-Track Construction
• Phased construction / fast-track construction
– Stages of design and construction overlap, thereby shortening
the time necessary to complete the project. • Fast tracking/ phased construction is allowed in
– Construction management (e.g. agency CM, CM at-risk)
– Multiple prime contracting systems. 15 2.3 Multiple Prime Contracting Delivery System
• A single contract for the construction is commonly used. The single
contract is usually the easiest to administer because of its
centralization of responsibility, namely, one owner, one contractor,
and one construction contract.
• Sometimes, the owner divides a project into more than one part
and contracts directly with several contractors rather than with a
single prime contractor.
– E.g. separate contracts with major specialized trades like
electrical contractor, plumbing contractor, heating ventilating
and air conditioning (HVAC) contractor, and the contractor for
construction of the building itself.
Contractor A/E Prime
Contractor Sub Sub Prime
Contractor workers 16 • Pros:
– Allows phased construction
– Permits more firms to bid for the work
lower prices due to increased competition • Cons:
– More time and expense for the owner to receive separate bids
and/or to negotiate...
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This document was uploaded on 01/28/2014.
- Fall '14