Auburn University
Auburn University
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Auburn University
 


B10 Superstructure

  1. General


    1. Auburn University favors structural work in reinforced concrete as opposed to steel or wood systems.  Variance required for wood structure.


    2. The structural design engineer shall clearly define and approve testing methods and frequency for both shop and field work.


    3. Vibration, deflection, and anticipated settlement shall be analyzed with regard to the specific programmatic requirements of each building.  For example, laboratories may have equipment that is especially sensitive to vibration or movement.


    4. The location of building expansion joints shall be coordinated between all trades including but not limited to structural, mechanical, electrical, architectural, and interior finishes.




  2. Concrete


    1. No lightweight concrete is to be used


    2. Hot and cold weather requirements shall be defined or clearly referenced.


    3. Calcium chloride or admixtures containing chlorides shall not be used.


    4. An approved air-entraining admixture shall be used for all concrete exposed to weather.  When used, the concrete must be tested at the site immediately prior to placement to verify the proper amount of air-entrainment.


    5. Before any admixture is specified, the designer must submit a written rationale for the use of the admixture with regard to the specific project.


    6. Control joints, isolation joints and construction joints shall be designed, located, and otherwise clearly defined by the designer appropriate details. Construction documents must include a comprehensive joint layout and detail drawing.


    7. Control joints shall be coordinated with interior partition walls where possible.


    8. Control joints for slab-on-grade construction shall be spaced no wider than 30 times the slab thickness.


    9. Control joints to be to a depth of 1/3 the slab thickness.


    10. The use of plastic strips with a removable plastic tee on top are encouraged for creating control joints. (See Figure B10-1)

    11. Figure B10-1Figure B10-1

    12. Saw cutting control joints is allowable with permission when flatness is a requirement.


    13. If joints are to be saw cut, they must be sawed within 12 hours of the concrete being poured, if the overnight low temperature is expected to be greater than 70° F and within 24 hours in all other cases.


    14. Reinforcing coverage in concrete must meet the requirements of the most current version of American Concrete Institute (ACI) 318.


  3. Structural Steel

    1. Clearly define limits and type of paint for metal elements including primers. Shop painting is preferred. Preparation methods prior to applications of primers and paints shall be described in the specifications.


    2. All welded connections shall be made by an American Welding Society (AWS) certified welder. The use of "pre-qualified welds" is encouraged.


    3. In order to achieve the Fire Rating as required by the Building Code, structural steel and steel decking to be protected with gypsum board sheathing, rather than sprayed fireproofing systems.  In limited cases where spray-on fireproofing must be used, follow the manufacturer’s guidelines relative to the preparation, priming, and painting the steel.


    4. All structural steel in exterior locations (such as cornices, parapets, hand rails, guard rails, or canopies) must be hot dip galvanized.
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