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
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