SECTION 12610
AUDITORIUM SEATING
SPECIFICATIONS:
PART 1: GENERAL
1.01 SCOPE: Deliver and install fixed chairs, Seating Concepts, LLC Model BW 220 Contour, with upholstered seats and upholstered backs and aisle and center standards, all as specified, floor or riser mounted, with selflifting seat which raises automatically to a uniform 3/4 fold position.
1.02EXAMINATION & ACCEPTANCE OF WORK IN PLACE: Examine work in place on which seating work is dependent. Defects which may influence satisfactory completion and performance of seating work shall be corrected in accordance with the requirements of the applicable section of work prior to commencement of seating work.
1.03FIELD MEASUREMENTS: Take field measurements to verify or supplement dimensions indicated. Be responsible for accurate fit of work.
1.04SHOP DRAWINGS: Submit a complete seating plan developed from the contract drawings, showing all chairs, sizes, and aisle widths. Assume complete responsibility for the accuracy of all chair measurements shown on the seating plan.
1.05 SIZES: Varying lateral sizes of backs shall be used in accordance with approved seating plans, with standards in each row spaced laterally so that the end standards shall be in alignment from first to last row whether aisles are of constant or converging width.
1.06RESPONSIBILITY OF BIDDER: The bidder must provide the following with his bid:
Certain reasonable and relevant performance tests are incorporated as part of this specification. The bidder shall submit, as part of his bid, certified copies of test reports by a recognized independent test laboratory establishing conformance to the performance tests. Failure to supply these test reports shall result in disqualification of the bidder.
1.07 DELIVERY: Deliver the seating at a proper time for installation that will not interfere with other trades operating in the building. Bid seating for installation and completion as specified.
1.08 MATERIALS AND WORKMANSHIP:
A. Provide new materials of types specified.
B. Turn over all work to the owner in undamaged condition.
C. Provide workmanship of the best quality by craftsmen skilled in their respective trades.
1.09 WARRANTY:
- Provide a manufacturer's warranty covering the material and workmanship for a period of five years from the date of final acceptance.
- Repair or replace any part which becomes defective during the warranty period, excepting where the product has been subject to accident, alterations, abuse, misuse or neglect.
PART 2: MATERIAL SPECIFICATIONS
2.01Steel: All steel shall have smooth surfaces and be of sufficient gauge thickness and designed to withstand strains of normal use and abuse.
2.02Padding Material: Seat and back padding material shall be of cold molded polyurethane foam. Padding materialshall comply with the flammability requirements outlined in California Technical Information Bulletin #117, Resilient Cellular Materials, Section A & D, dated March 2002, when tested in accordance with Federal Test Method Standard 191, Method 5903.2.
2.03Wood: Plywood, exposed or concealed, shall be hard wood. All plywood shall be hot press laminated using high frequency process. Interior plys shall be Class 3 or better. Exposed exterior plys shall be Class 1. Particle core shall be 55 pound density.
2.04 Plastic: Plastic shall be injection molded, high density polyethylene with ultraviolet light inhibitors to retard fading. Plastic shall have a burn rate of I" per minute when tested in accordance with ASTM D635 or the Department of Transportation of Motor Vehicle Safety Standard No. 302.
2.05 Plastic Laminate: Plastic laminate shall be composed of a core of kraft papers impregnated with phenolic resins, a decorative surface sheet, and overlay sheet containing melamine. Layers are fused together under pressures in excess of 1000 PSI, and temperatures over 275 degrees. Plastic laminate shall meet or exceed performance standard as established by N.E.M.A.
Thickness: Horizontal Surfaces .050
Vertical Surfaces.030
2.06 FINISH:
A. Metal Parts: Prior to the application of epoxy powder finish, all metal parts shall be cleaned by use of a three step process consisting of an iron phosphate, hot water rinse and a chromic acid rinse. All metal parts, both exposed and non-exposed, shall be coated with an epoxy powder which shall be electrostatically applied. All metal shall have a Minimum Dry Film Thickness of at least two millimeters and shall pass the 2H hardness test. All coated metal parts shall be oven baked at not less than 360 degrees.
B. Wood Parts: All exposed surfaces shall be stained to color selected and coated with lacquer of sufficient film depth to afford wear resistance of institutional quality and oven baked.
C. Plastic Parts: Color of plastic shall be selected from manufacturers standard color range.
D. Hardware: All assembly hardware shall be rust resistant, black plated.
E. Fabric and color shall be selected from manufacturer’s standard fabric selection.
PART 3: PERFORMANCE REQUIREMENTS
Select one of the two options:
3.01Seating shall be designed and manufactured in compliance with the intent of ANSI/BIFMA X5.4-1990.
Seating shall exceed all applicable BIFMA performance test criteria.
or
3.01Test 1 Vertical Drop Impact Test to Seat:
Test Sample: Three Unit Upholstered Seat and Back Auditorium Chair.
Test Description: This test consists of repeated impacts of a forty pound 10 inch diameter sand bag dropped on the seat at an approximate rate of 20 impacts perminute. The center of impact is to be at the center of the seat. The chair tested shall be the middle chair of a three chair assembly.
Tolerances:Bag weight plus or minus one pound.
Bag diameter plus or minus one inch.
Test Criteria: The bag shall be dropped as follows:
25,000 times from a height of 6”
25,000 times from a height of 8”
25,000 times from a height of 10”
25,000 times from a height of 12”
Acceptance Criteria: Measurements of the seat height are to be taken at the completion of the first 100 impacts and then at the completion of the test. The height of the seat measured at the front edge shall not drop more than ¾”. There shall be no loosening of the floor fastenings or of the pivots which retain the seat to standards. The seat must be able to return to normal fold position.
3.02Test 2 Swinging Impact Test:
Test Sample: Use the same threechair assembly as previously used for the vertical drop impact tests except for the following changes: Rearrange the setup so that the two (outside) outer standards become the middle standards, one outer seat and back shall comprise the middle chair. The previously tested middle chair parts are to be used for the outer (right and/or left) chairs.
Test Description: This test consists of repeated impacts to the chair's back of two 40pound, 10”diameter sand bags. The bags mounted at 13” centers are to be pivotally hung from a horizontally reciprocating actuating bar cycling at approximately 35 strokes per minute. The sand bags are to be filled with dry sand and hung with the bottom of the bag 32” below the pivot suspension point and 10”
below the top of the chair back. The chair back is to be centered between the bags when the bags are in the center of the stroke.
Tolerances:Bag weight plus or minus one pound.
Bag diameter plus or minus one inch.
Test Criteria: The number of impacts and the horizontal stroke of the actuating bar shall be as follows:
30,000 impacts (cycles) through a distance of 4-3/4”
20,000 impacts (cycles) through a distance of 6”
10,000 impacts (cycles) through a distance of 8”
Acceptance Criteria: At the completion of the test, the middle standards shall have demonstrated sufficient strength and durability to withstand the test without failure or irregularities that would impair the unit's usefulness. Also, no visible evidence of failure or irregularities shall have occurred in the seat or back of the unit.
3.03Test 3 Static Load Test to Seat:
Test Sample: A single floor mounted chair unit.
Description: A vertical static load is to be applied to the top of the seat with the center of the load approximately 3” from the front edge and equal distance from the sides. A beam (2” x 4”) is to be used to distribute the load transversely across the seat.
Test Criteria: The test load of 600 pounds is to be applied at the rate of approximately 2” per minute.
Acceptance Criteria: Chair must withstand a minimum load of 600 pounds with a permanent distortion not to exceed 5/8”. Deflections and permanent distortions are to be measured at the front center edge of the seat.
3.04 Test 4 SelfLifting Seat Oscillating Test:
Test Description: The seat shall be loweredmechanically against the down stop, and then released at a rate of 20 times per minute by means of 2 hard rubber rollers attached dually to the end of an actuating bar. The rollers shall be 4” in diameter and contact the center of the seat approximately 5” to 5-1/2” from the rear edge. The mechanism shall allow the seat to cycle freely through its full operation.
Test Criteria: 300,000 Cycles
Acceptance Criteria: At the completion of the test the seat will have demonstrated sufficient strength and durability to withstand this test without any appreciable loss of the seat's selfrising action or excessive loosening of components.
PART 4: Construction Details
4.01 Chairs
A. STANDARDS:
Standards shall be pedestal design made with a rectangular tube with 18 gauge steel 1” x 3”. The tube shall be attached by a concealed weld to a 3-1/4” x 8” 14 gauge deep formed steel foot. The foot shall have four holes for attachment of the standard to a concrete floor with lead shielded expansion bolts. Three bolts shall be used for attachment of the rocker and two bolts shall be used for attachment of the fixed chair or lounger chair and four screws shall be used to attach to a wood floor surface (see wood floor surface thickness requirements). A reinforced ¼” bracket for seat pan attachment shall be integrated into the standard which has an inlay at mid point for resistance upon force. The seat pan shall be anchored to the standard by use of a hexagon 5/16” fusion nut and a hexagon bolt of 5/16” x ¾” through a threaded insert on the seat bracket. A lug support for attachment of the back shall be made of 14 gauge sheet metal. Welded to the top of the column shall be a 14 gauge plate for armrest attachment. The standard foot shall be 1” x 3” steel, ¼” thick.
B. AISLE STANDARDS:
The aisle standards shall be tapered, oval or rectangular, fabricated in the same manner as the center standards with a formed frame of 16 to 20 gauge steel welded to the column to accept a decorator panel finished with laminated plastic, upholstery or with the finish to be selected by architect. End panels to be furnished pursuant to the plan of seating.
Riser mounted standards shall take into account the curvature of the riser. The standards shall be a rectangular tube, 1” x 3” with a break to ensure that the seat height is 18” from the floor. A 4” x 4” steel plated shall be continuously welded to the tube for attachment to the riser. The riser height must be at least 8” high and 90 degrees, plus or minus 1/8”.
C. RISER STANDARDS:
Riser mounted standards shall take into account the curvature of the riser. The standards shall be a rectangular tube, 1” x 3” with a break to ensure that the seat height is 18” from the floor. A 4” x 4” steel plate shall be continuously welded to the tube for attachment to the riser. The riser height must be at least 8” high and 90 degrees, plus or minus 1/8”. Four expansion bolts are required to attach the standard to the surface.
D. SEAT CUSHION AND SEAT PAN WITH HINGE:
Seat cushion shall be of arch-spring type. The seat cushion frame shall be of one piece reinforced injection molded polypropylene. Serpentine springs of normalized steel of 10 gauge, painted in epoxy paint to prevent corrosion, shall span the frame and be secured to the injection molded frame so as to eliminate noise. The spring assembly shall be covered by a tough and durable inter-liner to provide a chafing barrier to protect the cold molded polyurethane seat cushion. The seat cushion shall be cold molded to the contour of the springs to provide a raised outer edge so that the overall seat foam is contoured for exceptional body support in the hip area. The foam shall have a density of 3.4 +/- point two. The seat frame shall have two steel bars that span the width of the cushion and which provide additional strength and support. The seat frame shall rotate on one ½” diameter cold rolled steel hinge rod securely attached to the seat frame. The additional hollow steel tube is attached to the rear of the frame for additional strength, support and stability. The specified fabric, carefully tailored, shall be of panel side construction and manufactured as a slip cover with a zipper. The slip cover fits over the entire assembly in order to allow ease in replacement.
The self lifting mechanism shall be a counter balance system integrated within the seat frame and which utilizes a weight inserted into the interior of the seat frame which allows the seat pan to return to a 75 or 90 degree vertical position by means of gravity. There shall be two ½” square tube stops, two counter-stops and two 1” cold rolled steel bushings, all reinforced.
The seat frame and return mechanism shall be enclosed with an (select one option):
Injection molded polypropylene cover with a decorative embossment
Steel cover with decorative embossment surfaced with powder paint
Upholstered cover in selected fabric
Laminate cover
Veneer cover
and attaches to the frame without screws or other fasteners but which can be removed with the use of a specially supplied tool. The rear of the injection molded and metal seat pan shall be vented to allow the foam to breathe.
- Back:
Chair back shall be padded with a cold molded polyurethane foam increasing in thickness from 2” thickness at the top to 3” at the bottom and contoured for additional lumbar support. The foam shall be cemented to 5 ply 7/16” plywood base with four ¼” threaded inserts for the attachment of two die formed metal supports (back wings), 14 gauge, with four cold-rolled galvanized flat head steel screws ¼” by ¾”. This shall be mounted onto a high impact, injection molded polyethylene outer back. All attachment screws shall be fully concealed. Back wings shall have provision for 16 degree, 20 degree or 24 degree pitch. The height of the back to the floor shall be 34” as measured in the 20 degree back pitch.
F. ARMRESTS:
The armrests shall be of solid hardwood, stained to a finish or surfaced with laminate as selected by the architect, injection molded or upholstered. They are designed to have a perfect fit with the standards of the chair, which have an exuberance in the lower section, perfectly distributed to hold four lag screws of coldrolled galvanized steel 1/8” x 19/32". The armrest for the center standards shall be substantially similar in size to the aisle standard armrests.
- ACCESSORIES:
See Accessories information for inclusion of:
Number and letter plates
Swing away ADA aisle transfer panel
Aisle lights
Donor plates
Tablet arms
Book racks and holders
Cupholders
Movable metal bases (with or without wheels)
Perforated seat pan
Electrical/Data Provisions
H. SPARE PARTS:
Provide a miscellaneous overrun of seat and back component parts installed distributed in varying sizes.
I. AMERICANS WITH DISABILITIES ACT (ADA):
Wheelchair Areas: Should be an integral part of any fixed seating plan and be dispersed throughout the seating area. No longer should wheelchair spacing be limited to the rear of the auditorium or theatre but should be situation at the front or in other locations in compliance with the Act. Wheelchair areas should still adjoin an accessible route that also serves as a means of egress in case of an emergency and should still be located in an area that provides lines of sight comparable to those of all other viewing areas.
Semiambulant Individuals: In addition to spaces provided for wheelchair users as noted, there shall be provided seating for semiambulant individuals. The number of such seating shall be equal to at least one percent of the total seating and shall be no fewer than two or as predicated by local or state ordinances. Such seats shall provide at least 24 inches clear leg space between the front of the seat to the nearest obstruction or to the back of the seat immediately in front.
Disabled Persons Transfer Units: Aisle standards designated on the contract drawings shall be arranged for easy access by handicapped individuals and shall be designed to allow the individual to transfer easily from a wheelchair to the fixed audience chair. The aisle standard support column shall be inclined to the rear at the top by 16 degrees, and shall be equipped with an armrest capable of lifting to a position parallel with the chair back, opening sideways access to the seat. Aisle standards so equipped shall be provided with a label, displaying an easily recognizable "handicapped" symbol. Decorative requirements of aisle standards are waived for the Handicapped Access Standards.
PART 5: EXECUTION
5.01Scope of Work: The installation is to be performed by the successful bidder, under the direction of a capable superintendent, in a manner satisfactory to the Architect, and the job turned over to the ownerwith all chairs complete and ready to use.