PRINCIPAL FACTORS IN QUALITY CONTROL

 

Apply this IM appendix for both LRFD and LX beams.

 

1.     Management Commitment to Quality

 

a.   All producers shall develop a statement describing their commitment to quality.

 

2.     Safety-Management Commitment to Safety

 

a.   Safety Policy

 

b.   Safety Program

 

c.   Designated Safety Officer

 

d.   Compliance with applicable laws, rules, regulations and ordinances governing safety.

 

3.     Qualified personnel for all stages of fabrication (See requirements of Section 2407.01.)

 

  1. Maintain a list of plant personnel skilled and experienced for each fabrication process and the minimum number of skilled and experienced personnel needed for each process. (superintendents, lead workers & foremen)

 

  1. Identify personnel who prepare shop and/or production drawings.

 

  1. Maintain a list of personnel who are trained, certified and are responsible for QC inspection.

 

  1. Maintain a list of specially trained and authorized personnel to do tension and detentioning.

 

4.     Testing and inspection of the various materials selected for use

 

  1. Identify all materials sources.

 

  1. Procedures used to assure that only approved materials will be incorporated into the work

 

  1. Storage methods and stockpiling of various materials

 

5.     Clear & complete shop drawings

 

  1. Procedures for developing and distributing shop and production drawings

 

  1. Procedures for submittal of drawings for approval by the Design Engineer and/or the Consulting Engineer.

 

6.     Accurate stressing procedures

 

a.   Calculation procedures

 

b.   A prescribed stressing procedure repeated every time the bed is used

 

c.   Description of tensioning equipment and stressing beds

 

d.   Checking for line and grade

 

7.     Control of dimensions and tolerances

 

  1. Form condition assessment procedures

 

  1. Strand placement accuracy methods

 

  1. Form alignment procedure methods

 

  1. Overall dimensional accuracy methods

 

8.     Positioning of all embedded items

 

  1. Procedures for accurate placement of reinforcing steel, sole plates and inserts, etc.

 

9.     Proportioning and adequate mixing of concrete

 

a.   List of all approved mix designs & applications

 

b.   Description of mixing units, including manufacturer’s recommended capacity

 

c.   Procedures for producing concrete of uniform quality batch after batch

 

d.   Description of maintenance and up-keep procedures

 

10.  Handling, placing and consolidation of concrete

 

a.   Description of consolidation method (number and type of vibrators, consolidation zones)

 

b.   Number of lifts during placement and placement procedures

 

c.   Cold and hot weather concrete placement procedures

 

d.   Timeliness of placement

 

e.   Delivery (hauling and handling) methods

 

f.    Finishing methods

 

g.   Procedures to avoid cold joints in concrete placement

 

11.  Curing

 

a.   Procedures and equipment used to cure the concrete

 

b.   Procedures used when artificial heat is used in curing

 

c.   Equipment used to monitor curing temperatures

 

d.   Corrective action (methods & procedures)

 

e.   Form removal

 

12.  Accurate detentioning procedure

 

a.   Single strand detentioning procedure (if used)

 

b.   Multiple strand detentioning procedure (if used)

 

c.   Draped strands detentioning procedure (if used)

 

13.  Final finish, storing and transporting units

 

a.   Procedure for preparing and finishing facia girders

 

b.   Final finishing procedures

 

c.   Maintenance and upkeep of dunnage

 

d.   Overhang, tie down and protection procedures

 

e.   Notification for final inspection and approval

 

14.  Record keeping

 

a.   Timeliness of documentation

 

b.   Samples of records kept

 

c.   Samples of forms used

 

d.   Availability of records and documentations

 

15.  Problem resolution procedures

 

16.  Repair procedure

 

a.   Minor repair

 

b.   Structural repair