SECTION 11458
  
DISAPPEARING STAIRWAY
    
PART 1:  GENERAL

1.01 SUMMARY
       A.  Metal Folding Disappearing Stairway including stairway, frame and door.
       B.  Products Required, But Not Supplied Under This Section.
            1.  Required fasteners.

1.03 SYSTEM DESCRIPTION
       A.  The system requires a ceiling opening of 2'-6" X 5'-4" ( 30" X 64") For floor to
           ceiling dimensions of from 9'-10' to 12'-0" and a ceiling to upper floor dimension of
           more than 1'.  The rough opening at the level above shall be 30" x ** (**refer to deep 
           frame chart for this dimension).
  
1.04 DELIVERY, STORAGE AND HANDLING
       A.  Examine stairway when it arrives on site.  Notify the carrier and manufacturer of any
           damage.
       B.  Store stairway until installation  under roof, if possible; or, if stored outside,
           under a tarp or suitable cover.
  
1.05 WARRANTY
       The unit carries a limited warranty of 1 year against defective material and workmanship,
       covering parts only, no labor or freight.  Defective parts, if deemed so by the
       manufacturer, will be replaced no charge, freight excluded, upon inspection at
       manufacturer's plant which warrants same.
  
1.06 MAINTENANCE
       A.  Under normal usage, the stairway shall require no preventive maintenance.
       B.  No "Spare Parts" shall be required.
  
1.07 PRICING
       Unit pricing is available from Precision Ladders, LLC representatives or by
       calling (800)225-7814.
  
PART 2: PRODUCTS
  
2.01 MANUFACTURER
       Precision Ladders, LLC - P. O. Box 2279 - Morristown, Tennessee 37816-2279.
       Phone: (800)225-7814.  FAX: (423)586-2091.
  
2.02 MATERIALS
       A. Door
           1. 1/8" aluminum door panel (standard) or 20 gauge steel door with 2 hour
              fire-rated Warnoc Hersey label that meets ASTM E-119 & UBC 43-7 requirements,
              passed 250° temperature rise in the first 30 minutes(optional).
           2. Steel piano hinge.
           3. Door overlaps bottom flange of frame (standard). Fire rated steel door is
              flush with bottom of frame.
           4. Eye bolt accommodates pole for opening and closing.
       B. Stairway
           1. Stringers
               1.1  6005-T5 Extruded aluminum channel 5" X 1" X 1/8"
               1.2  Tri-fold design
               1.3  Steel blade type hinges
               1.4  Adjustable foot with plastic Mar-guard.
               1.5  Pitch 63° (standard).  Other pitches optional.
  
           2. Treads
               2.1  6005-T5 Extruded aluminum channel 5 3/16" X 1 1/4" X 1/8".
               2.2  Depth 5 3/16".
               2.3  Width 21 1/4" (standard). Widths to 30" available.
               2.4  Deeply serrated top surface.
               2.5  9 1/2" riser height (standard). Other riser heights available.
               2.6  500 lbs load rating.
  
       C.   FRAME
             Custom fabricated from 1/8" steel with factory-installed tread(s) to cover the
             distance from finishedceiling to finshed floor above. Frame shall be on a 63 degree
             angle on the hinge end in order to continue the climb from ceiling and beyond on the 
             same incline as the folding portion of the unit.  The frame shall have
             pre-drilled and mounted brackets to allow for hanging from and fastening to the
             floor above.
  
       D.   HARDWARE
             1. Steel blade type hinge connecting stringer sections, zinc-plated and
                chromate-sealed, bolted to stringers.
             2. Steel operating arms, both sides, zinc-plated and chromate-sealed.
             3. Double acting steel springs and spring cables, both sides.
             4. Rivets rating at 1100# shear.
  
       E.   SAFETY
             1. Steel bar handrail riveted to stringers, upper section, right side standard.
                Other locations optional
             2. Steel section alignment clips at stringer section joints.
             3. Molded rubber guards at corners of aluminum door panel.

       F.   MANUFACTURED UNITS
            The disappearing stairway is a Model SS/AL-***. (*** = ceiling height in inches -
            maximum is 144).
  
       G.   ACCESSORIES
         1. Steel pole to aid opening, closing and unfolding stairways.  The pole is equipped
            with a hook on one end and (on taller units) a "T" on the other. Supplied.
         2. Optional keyed lock for door.
  
       H.   FABRICATION
            The stairway is completely fabricated ready for installation before shipment to the
            site.
  
       I.    FINISHES
             1. Mill finish on aluminum stairway components.
             2. Prime coat on frame.
               
       J.   SOURCE QUALITY CONTROL
            All products tested in factory test jig for proper operation before shipment.
  
  Part 3: EXECUTION
  
  3.01 EXAMINATION
       Examine rough opening in ceiling for opening size and squareness.
  
  3.02 INSTALLATION
       Install per the manufacturer's installation instructions.
  
  3.03 FIELD QUALITY CONTROL
       The manufacturer has representatives in all areas of the United States and Canada. For the 
       name of the closest representative, call (800)225-7814.
  
END OF SECTION