11

TS&L ExpectationsTS&L Expectations

What is included in a What is included in a TS&L?TS&L?

22

TS&L ExpectationsTS&L Expectations

Per BDDM 1.1.2.11 – The end product of a TS&L Per BDDM 1.1.2.11 – The end product of a TS&L design includes:design includes:

•TS&L Plan and Elevation DrawingTS&L Plan and Elevation Drawing•TS&L Estimate of structure construction costTS&L Estimate of structure construction cost•TS&L NarrativeTS&L Narrative

Also necessary to justify the package above:Also necessary to justify the package above:

Sketches of alternate bridge types consideredSketches of alternate bridge types considered

Cost estimates of alternate bridge types consideredCost estimates of alternate bridge types considered

33

TS&L ExpectationsTS&L Expectations

What other important What other important element is missing?element is missing?

TS&L ChecklistTS&L Checklist

44

TS&L ExpectationsTS&L Expectations

How many alternates How many alternates should be considered?should be considered?

3 – Including the selected type3 – Including the selected type

55

TS&L ExpectationsTS&L Expectations

What kind of alternates What kind of alternates can/should be considered?can/should be considered?

Single Span vs. Multi-spanSingle Span vs. Multi-span

Steel vs. ConcreteSteel vs. Concrete

Precast vs. Cast-in-PlacePrecast vs. Cast-in-Place

Spread Footings vs. PilesSpread Footings vs. Piles

Bridge vs. CulvertBridge vs. Culvert

Spliced / PTSpliced / PT

A 1010 SteelA 1010 Steel

Precast DecksPrecast Decks

Precast capsPrecast caps

ABC vs. Conventio

nal

ABC vs. Conventio

nal

66

TS&L ExpectationsTS&L Expectations

What is included in the TS&L What is included in the TS&L Narrative?Narrative?

77

TS&L ExpectationsTS&L Expectations

BDDM 1.1.2.11(3) lists a general outline of BDDM 1.1.2.11(3) lists a general outline of possible discussion items.possible discussion items.

The wording needs to be changed to say The wording needs to be changed to say something like,something like,

“… “… a general outline of discussion items. a general outline of discussion items. Include all items that apply.”Include all items that apply.”

The word The word “possible”“possible” in the above does not in the above does not really capture the expectation.really capture the expectation.

88

TS&L ExpectationsTS&L Expectations

Include all applicable items in the list plus:Include all applicable items in the list plus:

Discussion of any unusual design elements, Discussion of any unusual design elements, such as:such as:• Sheet pile abutmentsSheet pile abutments• Aesthetic treatmentsAesthetic treatments• Experimental featuresExperimental features• Special features required by other agenciesSpecial features required by other agencies

Discussion of alternate types considered or Discussion of alternate types considered or reasons why alternates were not considered.reasons why alternates were not considered.

99

TS&L ExpectationsTS&L Expectations

Questions / Comments Questions / Comments ??

A draft BDDM update will be prepared for the April 2012 update.A draft BDDM update will be prepared for the April 2012 update.