Design Stage
Affect on Quantities Post-Bid
Affect on Contractor
Affect on Relationships
Enhancement of Construction Plans
Survey Subsurface Investigation In-House construction of plans
Control was not tied down Used bad control information Acquired insufficient or erroneous
information Topo all tie in points Survey the existing crowns
Use of companies with poor past history Same issues that contractors see
Flight Data Use Accuracy
Insufficient or incomplete boring information
Verification of information received
Plan sheets Construction Layout
o Missing datao Profiles do not tie togethero Side streets tied in wrong
Typicals – Plan Sheets – Cross Sectionso Different informationo Superelevationso Missing typical sectionso Guardrail flareso ROWo Drainage ditches
Drainageo Incorrectly locatedo Superelevationso Low pointo Missing structures
Plan sheets Structures
o Alignments and elevationso Sloping caps and abutmentso Boxoutso Wall profiles
Utilitieso Not shown on the planso Not depicted correctlyo How do we design around this information?
Plan sheets Erosion
o Areas are overwrought/untouchedo Silt Fence at cut slopes and shoulderso Stagingo Site visits
Stagingo Drainageo Taperso Widths
ROWo Drainageo Cost to cure information
To the owner
To the contractor
To the designer
Resurvey Office calculations Project delay Quantity overrun Cost Quality Public Opinion
Right now, your project would have to be considered a disaster. I could have
walked from the fire station to Abernathy faster that was able to drive. Yet
once past Abernathy, I was able to drive between 40 and 50 mph.
There is a major flaw in your design that I can't believe. Just before Johnson's
Ferry hits Abernathy coming from Sandy Springs, the road used to expand
into two outbound lanes. That allowed you to queue up twice the number of
cars waiting for the next green light. When that light turned green, those cars
were able to take off in a straight line, rather than having to make a left turn.
In other words, your new intersection is about 40% as efficient for all those
commuters coming down Johnson's Ferry.
If this abysmal design is not fixed, you will see accidents and
potentially violent behavior at Sandy Springs Circle and and
Johnson's Ferry road. Commuters will be furious if today's
experience is truly representative of what you have created. I mean
tar and feather, fire someone furious.
I hope there is better to come. If not, someone in your office should
experience career consequences for such an obviously horrible
design.
Regards,
Contractor is not a designer Understanding Design Intentions Adversarial Relationships How do we resolve problems?
Time to review and absorb plans Building survey files Resolve discovered omissions/errors or correct
the contractor Begin construction Stake the project and absorb the stakes Resolve omissions/errors discovered in the
field (for the life of the project)o The superiority of the three dimensional field
Survey is the key Attention to detail Incorporate knowledge from past
mistakes Neat and visible Willingness to listen and help No designer is perfect – no contractor is
perfect Compliment of views Give and take (Total cooperation from
owner/designer/contractor)
Questions or Comments
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