United States Department of Transportation - Federal Highway Administration FHWA Home Feedback
   CALENDAR OF EVENTS divider TRAINING divider TECHNOLOGY DEPLOYMENT divider TECHNICAL ASSISTANCE
   Home   divider  end of menu

Photo:  Multiple bridges

Structures Home
space image
Structures Solutions/Best Practices
space image
Structures Training
space image
Structures Newsletters & Publications
space image
Structures Media Center
space image
Structures Calendar
space image
Structures Links
space image

POLICY
space image
 

FHWA Resource Center

STRUCTURES TEAM

QUESTIONNAIRE FOR MID-ATLANTIC REGION PCEF ABOUT
DESIGN CONSIDERATIONS FOR PRESTRESSED CONCRETE MEMBERS

State: ______________

1. Type of strands patterns at end of girders used within your state:

Check ALL that apply:
Allow in current specifications Have used in the past 10 years

Straight
Straight and Draped
Straight with unbonding
Combination: Straight, draped and unbonded

DESCRIBE CRITERIA:

2. Type of strands used within your state:

Check those that apply:
Allow in current specifications Have used in the past 10 years
½ “ diameter strands - low relaxation
½ “ diameter strands - stress relieved
½ “ diameter strands (Special 0.167 in2) low relaxation
½ “ diameter strands (Special 0.167 in2) stress relieved
0.6“ diameter strands - low relaxation
0.6“ diameter strands - stress relieved
7/16” diameter strands - low relaxation
7/16” diameter strands - stress relieved


DESCRIBE CRITERIA:

3. Standard spacing of strands used in standards in your state:
a. 2” spacing for ½“ strands Yes ______ No ______
b. 2” spacing for 0.6“ strands Yes ______ No ______
c. Other Yes ______ No ______

DESCRIBE CRITERIA:

4. Does the specification and/or state practices limit the amount of unbonding strands allowed at specific locations in the beams?

a. 25% of strands Yes ______ No ______
b. 25% at one third, one third, and one third * Yes ______ No ______
c. 25% at ½, and ½ ** Yes ______ No ______
d. Other Yes ______ No ______

* 25% with maximum of ? of debonded strands terminating at each location.
** 25% with maximum of ½ of debonded strands terminating at each location.

DESCRIBE CRITERIA:

5. Does the specification and/or state practices limit the location of unbonded strands?

a. Interior strands only Yes ______ No ______
b. Interior strands distributed uniformly Yes ______ No ______
c. Int. & Ext. strands distributed uniformly Yes ______ No ______
d. Other Yes ______ No ______

DESCRIBE CRITERIA:

6. What is the allowable tension stress in the precompressed tension zone (i.e., at or very near midspan at the bottom of the girder)?

a. Zero tension Yes ______ No ______
b. 3*sqrt(f’c) Yes ______ No ______
c. 6*sqrt(f’c) Yes ______ No ______

DESCRIBE CRITERIA:



7. Does the amount of allowable tension in the precompressed tension zone differ according to environment?

Environment Type Zero Tension 3*sqrt(f’c) 6*sqrt(f’c)
Normal Environment
Severe Environment
Other

DESCRIBE CRITERIA:

8. What criteria (if any) does the state have for determining the spacing of diaphragms?

a. Midspan and/or maximum of 40’ Yes ______ No ______
b. Midspan and/or maximum of 60’ Yes ______ No ______
c. Midspan and/or maximum of 80’ Yes ______ No ______

DESCRIBE CRITERIA:



9. What type of stirrup reinforcement is specified/allowed to minimize tripping hazards on the top of the prestressed concrete girder?

a. Pin type stirrups Yes ______ No ______
b. 2 - 90º type stirrups Yes ______ No ______
c. Bulb Tee with top tie bar w/ 90º bend Yes ______ No ______
d. Bulb Tee with top tie bar w/180º bend Yes ______ No ______
e. Other Yes ______ No ______

DESCRIBE CRITERIA:

Contact Person: Rodolfo (Rudy) F. Maruri
Virginia Division
Assistant Division Bridge Engineer

Telephone No.: (804) 775-3361
Email Address: rodolfo.maruri@fhwa.dot.gov

AND/OR

Claude S. Napier
Virginia Division
Division Bridge Engineer

Telephone No.: (804) 775-3363
Email Address: claude.napier@fhwa.dot.gov


Thank you for completing the questionnaire. A summary of compiled results will be presented at the PCEF Committee meeting

FHWA Resource Center logo
yellow circle
CONTACT US
staff / phones

Technical Service Teams
Air Quality

Civil Rights

Construction & Project Mgmt

Environment

Finance Services

Geotechnical

Hydraulics

Operations

Pavement & Materials

Planning

Safety & Design

Structures

FHWA Logo

FHWA Home | Feedback
United States Department of Transportation · Federal Highway Administration