Auburn University
Auburn University
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Auburn University

B20 Exterior Closure

  1. Exterior Walls

    1. General

      1. Exterior envelope systems shall be selected with low maintenance longevity as the primary consideration. Exterior Insulation and Finishing System (EIFS) and uncoated concrete masonry systems are not acceptable.

      2. The University desires that in brick or block construction the building be of weatherproof assemblies and that the whole system be specified such that the buildings are waterproof. Clean cavity spaces, good quality membranes, and adequate weep holes are noted in particular.

      3. The University desires to have buildings designed to control efflorescence.

      4. Brick selections and mortar colors to be reviewed and approved by the University Architect

      5. It is desired to have finalized brick and mortar selections made and included in the bid documents. This is due to the University's long review and approval process for brick selection. This process shall occur during the design phase, and the designer shall include this in his design contract.

      6. A final exterior wall assembly sample panel must be constructed for approval of workmanship and materials and shall be built on site prior to beginning masonry work. The sample panel shall be designed by the Architect and presented to the contractor in the drawings.  The materials used shall be provided by the project suppliers and shall represent the final product in all aspects. The panel shall be protected from construction operations, but shall remain in place and exposed to the elements until all masonry work has been approved.

      7. The designer shall adequately detail expansion joints so that un-controlled cracking does not occur.

    2. Brick

      1. The University has several brick types and bond patterns in various zones across campus.  New Construction shall utilize the same brick types and bond patterns as surrounding buildings.

      2. In general, a smooth faced texture free of blemishes is desirable.

      3. Three bricks from three different suppliers shall be chosen during the design phase by viewing samples on site and comparing them to the surrounding area.  These three bricks will be specified in the contract documents.

      4. Special shapes shall be inspected by the designer for uniformity of size and color against the approved sample panel prior to installation.

      5. The Architect shall specify the minimum brick cut allowed at corners and jambs.

    3. Mortar

      1. Concave mortar joints tooled to properly solidify the surface of the mortar are required.

      2. There shall be no site mixing of mortar colors. Bags shall come from the manufacturer with premixed colors with only sand and water added at the site. Sand shall be added in consistent amounts through the use of a measured box rather than shovel counts. This helps assure consistent color, texture, and strength throughout.

    4. Stone

      1. The University desires in general that stone or cast stone match the limestone sample located in the Facilities Division. The sample is Indiana Limestone Company Empire Rustic Buff Smooth.  Every project shall receive approval from Facilities Division.

    5. Architectural Precast Concrete

      1. Architectural precast concrete must be manufactured using the wet cast method as opposed to the dry pack method.

      2. Both drawings and specifications shall note that the contractor is responsible for protecting the work and will take whatever precautions necessary to assure the work is not stained or vandalized.  Stained or vandalized work is not acceptable to the owner.

    6. Insulation

      1. Rigid board insulation is required between backup wall and brick veneer.

      2. All insulating must comply with ASHRAE 90.1.

    7. Waterproofing

      1. Use silicone sealants at all exterior joints.

      2. For the following exterior joint conditions use the listed materials or an engineer approved equal.

        1. Masonry-to-masonry or Masonry-to-stone

          1. Dow Corning 790

          2. Tremco Spectrum 1

          3. Pecora 890

        2. Metal-to-metal or Window/louvers-to-masonry

          1. Dow Corning 795

          2. Tremco Spectrum 2

          3. Pecora 895

        3. Exterior stone such as limestone, granite, marble, etc.

          1. Dow 756

      3. When joints occur between concrete block-to-concrete block or concrete block-to-poured in place concrete in cavity wall construction, use only polyurethane sealants in cavity.  Use the products listed below or an engineer approved equal.

        1. Sika Flex 2C by Sika Corporation

        2. Sonneborn NP-2 by Sonneborn

        3. Dymeric 240 FC by Tremco

      4. Cavity wall dampproofing shall be emulsion based systems such as those manufactured by Sonneborn, Karnack, and WR Meadows.  All dampproofing systems must be water-based and they must be applied pinhole free.  All sealants behind dampproofing must be polyurethane sealants.

      5. For cavity wall construction utilizing light gauge framing and Dens Glass Gold sheathing board, seal joints between sheathing boards; then apply a 2” fiberglass mesh tape fully embedded in sealant.  This is preformed before the dampproofing is applied.

      6. For all flashing use T304 stainless steel at 26-gauge thickness.

      7. All flashing splices must be covered with a third piece of flashing fully bedded in medium modulus silicone such as Dow 795, Tremco Spectrum 2, Pecora 895, or an engineer approved equal.

      8. Always carry throughwall flashing out of masonry veneer face, exposing edge to allow best drainage.

      9. Do not fasten window heads up through shelf angles.

      10. Dampproof all backupwalls, block masonry, sheathing, etc.

      11. Flashing must transition up behind dampproofing

      12. All stainless steel flashing must be end dammed at termination between through wall flashing and dissimilar systems.

      13. Through wall flashing consists of  a stainless steel pan and 40 mil thick asphalt modified waterproofing membrane from manufacturers such as WR Grace, Ploygaurd, Carlisle, or approved equal.  These membranes must be terminated on the stainless steel pan a minimum of 1” back from the face of the exterior masonry wall.  Termination of the membrane at the dampproofed backup wall must occur 8” above the mortar net drainage medium, or approximately 16” above the shelf angle.  Use a stainless steel termination bar, 3/4” wide by 1/8” thick anchored at 8” on center to terminate membrane at dampproofing sheathing.  Lap seal termination bar with trowel grade dampproofing.

      14. For masonry cavities at all through wall flashings use Dur-A-Cell vents or an engineer approved equal.

      15. Exterior sealants at wall penetrations and control joints to be approved by Auburn University Facilities Division.

      16. Provide adequate flashing at all necessary locations; including window and door headers, shelf angles, parapets, and where masonry walls rest on a slab on grade.

      17. The designer shall submit a diagrammatical representation of the path of travel of water from the sky across the building envelope to some appropriate drainage outlet.

    8. Masonry Restoration and Cleaning

      1. Because of the many variables involved, the designer planning to clean a masonry building shall carefully identify the facade materials, investigate the physical properties of each and understand their reactions to various pollutants and cleaners. Selection of the gentlest means possible consistent with accomplishing the desired result is recommended. Sandblasting or acid are not allowed as they may erode the surface of the masonry and damage adjacent surfaces. Each surface must be treated separately and protected from cleaning compounds and procedures intended for its neighbor. To determine the condition of the masonry surface and its reaction to cleaning, designers shall test-clean sections of the building that exhibit a typical range of problems.

  2. Exterior Windows

    1. Window interior and exterior materials shall be chosen to minimize maintenance. Baked-on enamels on aluminum and anodized aluminum are preferred finishes.

    2. The percentage of glazing to solid areas shall be analyzed and designed to fit the intended purpose and if possible to blend its surroundings.

    3. Air gap, U-Value, and R-Value are to be in accordance with minimum energy requirements of ASHRAE 90.1.

    4. Energy conservation must be given prime consideration when incorporating fenestration into building design.  Shading, orientation, low emissivity glass, insulating glass, and thermally broken frames shall be given consideration as potential energy conservation methods. When insulating glass is used, it shall be hermetically sealed to prevent condensation between the two layers of glass and shall have a 10 year warranty.

    5. Window frames shall be aluminum and of weather-tight design.

    6. Window sills shall be masonry, natural stone, or architectural precast.  

    7. Provision shall be made to allow for exterior cleaning of all windows with minimum inconvenience and hazard; e.g., double hung windows or windows which open into building.  Windows which are accessible from the ground and which are no higher than forty feet above grade are cleaned from the outside by the University, using a special window cleaning device.  Provide swing stage or other similar connections to facilitate window washing where height exceeds 40 feet and reach from nearest ground access exceeds 30 feet.

    8. All glass shall be tempered glass or safety glass.  Glazing stops which will cover the mill marks in the glass shall be provided.

    9. Wire glass to be specified as required by code.

    10. Exterior window wall assemblies for multiple stories shall be curtainwall construction.

    11. Punched window openings can utilize pre-manufactured widow waterproofing systems provided they meet the following minimum criteria:

      1. have flange for secondary water control

      2. minimum air filtration of .06 cfm/sq. ft when tested at 6.24 psf

    12. Testing is required on mock up assemblies for all new construction projects.  The testing shall meet a minimum standard of AAMA 501.2-03 criteria.  Testing shall be preformed by qualified firm.

    13. See Appendix J for window waterproofing details

  3. Exterior Doors

    1. General

      1. Materials shall be chosen to minimize maintenance.

      2. Provide window and door head flashing, through wall flashing, and counter flashing with 50-year minimum expected life.  Slope all ledges and horizontal surfaces 1/4"/ft. minimum.

      3. Auburn University encourages the use of two separate single doors or a battery of single doors in lieu of pairs.  Use pairs only where needed for access.  When used double doors shall have removable mullions with Best Lock cores.

      4. Specifications shall clearly call for proper inserts to receive hardware, provide for adequate reinforcing, and indicate gauge of door skin, inserts and reinforcing.

      5. Narrow-stile doors will not be accepted.

      6. Exit doors shall be openable at all times from inside without the use of a key or any special knowledge or effort.

      7. All seals shall be finished to match adjacent frame color.  Material shall be UL listed for labeled openings

      8. All exposed screws shall be Phillips head.

      9. See section F10-2 of this documentfor information concerning the Universities card access system.

      10. Except where stated otherwise below, door hardware shall have a minimum one year manufacturer’s warranty.

      11. All exterior doors shall be electrified and monitored from the “Basis” System and Software.

      12. At least one exterior door will have “Basis” BAS-2010 card reader.[6/2007]

      13. All electrified doors will be installed as “night function” so no manual locking is required.

    2. Size

      1. Doors shall have a maximum height of 8' and a minimum height of 6' 8" unless otherwise approved.

      2. All doors shall have a minimum width of 3' 0".

      3. Doors shall be standard 3'x 7' where possible. 

    3. Material

      1. Exterior doors shall be preferably aluminum or galvanized, painted steel.

      2. Exterior steel doors shall be 16-gauge hollow metal construction.

    4. Frames

      1. All exterior door frames shall be 14-gauge formed steel.

      2. Frame miters shall be welded and ground smooth.  Knock down or unwelded frames are not allowed.

      3. Interior dry storage shall be provided for all doors and frames; storage trailers are acceptable.  Steel doors and frames shall not be delivered until they can be placed in a dry area.

      4. Before finish paint is applied to doors and frames, all abraded areas shall be thoroughly sanded and reprimed.

    5. Door Hardware General

      1. Acceptable Manufacturers:  Best, Ingersoll, or Sargent unless noted otherwise in this section.

    6. Closers

      1. Use LCN 4041 series closers for exterior doors; for interior doors use LCN 1461 series.

      2. Closing of entrance doors shall be by a closer of  full rack and pinion type with removable non-ferrous cover

      3. Set exterior doors closers to have 8.5 lbs a maximum pressure to open.

      4. All closers to have cast iron bodies.

      5. Provide delayed reaction closers

      6. Closer shall be mounted in an inverted overhead position or in a parallel arm position. Surface mounted overhead closers are preferred. The use of floor closers is prohibited.

      7. Closer shall have a back check feature.

      8. Closers shall have a ten year warranty from supplier.

    7. Panic Devices

      1. Where required by applicable code, doors shall have panic devices.

      2. Where panic devices are required, outside trim shall be pull and cylinder (no movable knob or handle) with cylinder dogging inside. Rim type panic devices are required. Vertical rod hardware is discouraged.

      3. Keying is not to be included for panic hardware on exit doors.

    8. Exit Devices

      1. Exit devices shall be listed by Underwriters' Laboratories, Inc. for Accident Hazard. 

      2. Exit Devices for use on fire-rated openings shall bear factory installed UL markings that indicate a 3 hour fire rating.

      3. Warrant exit devices against failure due to defects in material or workmanship for a period of 3 years.

      4. The Access Control Shop prefers Von Duprin, EL RX 98 series with electric latch retraction and request to exit.

    9. Hinges

      1. Continuous gear hinges shall be manufactured of extruded 6063-T6 aluminum alloy/temper.

      2. Hinges shall consist of three interlocking extrusions in a pinless assembly applied to the full height of the door and frame.

      3. All hinges shall be manufactured to template screw locations and be non-handed.

      4. Thrust bearings shall carry the vertical loads and be completely concealed by the gear cap the full length of the hinge. 

      5. All mortise hinges shall cover and wrap the edge of door completely.

      6. All hinges shall be tested by a certified independent testing laboratory to 1,500,000 cycles and certified functional, ANSI 156.1.

      7. Bearings are not to be installed in hinge before electro-plating the hinge. If frozen bearings are found, replace the complete shipment.

      8. Access Control Shop prefers Hager hinges with a satin chromium finish, no. 626.

    10. Locksets and Latches

      1. During the design phase the designer shall consult with the Facilities Division - Access Control Department to discuss the specific requirements for card access and locks with regard to each projectd by applicable code, doors shall have panic devices.

      2. No plastic parts in locksets.

      3. All hardware must accept Best cores and be in Best cylinders.

      4. After installation, all templates, installation instructions, as built and special details to be placed in a properly identified binder.  This binder and all special tools are to be turned over to the AU Project Manager at project closeout.

      5. Mortise type locks and latches shall be heavy-duty with 3/4 inch throw latch bolt.

      6. Deadbolt functions shall be 1 inch projections made of hardened stainless steel.

      7. Both deadbolt and latchbolt are to extend into the case a minimum of 3/8 inch when fully extended.

      8. Furnish locksets and latchsets with sufficient curved strike lip to protect door trim.

      9. Provide locksets with Best 7-pin interchangeable core cylinders.  All mortise cylinders shall have a concealed internal set screw for securing the cylinder to the body.

      10. All mortise locksets must conform to ANSI A156.13, series 1000 operational Grade 1 and be listed by UL.  Locksets must fit ANSI A115.1 door preparation.

      11. Locks and latches to have self-aligning, thru-bolted trim.

      12. Auxiliary deadlatch to be made of one piece stainless steel, permanently lubricated.

      13. Levers handles must be forged or cast brass, bronze, or stainless steel construction and conform to ANSI A117.1.  Lever which contain a hollow cavity are not acceptable.

      14. Spindle to be such that it will twist first then break, thus preventing forced entry.

      15. Levers to be operated with a roller bearing spindle hub mechanism.

      16. Heavy duty mortise locksets with dead latches are preferred.  Inside trim shall include a turn lever to permit egress when door is locked.  Dead bolts are not acceptable except in special cases such as stores, snack bars, etc

    11. Bolts

      1. Where through-bolts are used to attach hardware to metal doors, spacer sleeves in doors shall be provided to prevent collapse of the door.

      2. Thru-bolt fasteners shall be templated so as not to make contact with the frame assembly.

    12. Kick Plates

      1. Provide with four beveled edges, 8 inches high by width 2 inches less than single doors and 1 inch for pairs of doors.  For rails less than 8 inches, provide height as required.

      2. Furnish screws to match finish.

      3. All kick plates and mop plates shall be stainless steel or brass and .050 in thick.
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