University at Buffalo Biomedical Education Building (BEB) Renovate Science Teaching Labs UB Project No: 2022-109

METAL LABORATORY CASEWORK 123553.13 - 1

SECTION 123553.13 - METAL LABORATORY CASEWORK

PART 1 GENERAL

1.01 SUMMARY

A. Section Includes:

1. Metal laboratory casework.

2. Filler and closure panels.

3. Laboratory countertops.

1.02 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. Shop Drawings: For laboratory casework. Include plans, elevations, sections, and attachments to other work including blocking and reinforcements required for installation.

C. Samples: For casework finishes and materials requiring color selection.

1.03 INFORMATIONAL SUBMITTALS

A. Product test reports.

1.04 REFERENCE STANDARDS

A. ASTM D3359 - Standard Test Methods for Rating Adhesion by Tape Test; 2023.

B. ASTM D3363 - Standard Test Method for Film Hardness by Pencil Test; 2022.

PART 2 PRODUCTS

2.01 MANUFACTURERS

A. Basis-of-Design Product: Subject to compliance with requirements, provide ICI Scientific CornerStone

Painted Steel Series Casework, Mott Manufacturing Casework or comparable product.

B. Product Designations: Drawings indicate sizes and configurations of laboratory casework by referencing designated manufacturer's catalog numbers. Other manufacturers' laboratory casework of similar sizes and similar door and drawer configurations and complying with Specifications may be considered. See Section 016000 "Product Requirements."

2.02 PERFORMANCE REQUIREMENTS

2.03 CASEWORK, GENERAL

A. Casework Product Standard: Comply with SEFA 8 M, "Laboratory Grade Metal Casework."

B. Flammable Liquid Storage: Where cabinets are indicated for solvent or flammable liquid storage, provide units that are listed and labeled as complying with requirements in NFPA 30 by a testing and inspecting agency acceptable to authorities having jurisdiction.

2.04 METAL CASEWORK MATERIALS

A. Steel Sheet: Cold-rolled, commercial steel (CS) sheet, complying with ASTM A 1008/A 1008M; matte finish; suitable for exposed applications.

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2.05 CABINET HARDWARE

A. General: Provide laboratory casework manufacturer's standard, commercial-quality, heavy-duty hardware complying with requirements indicated for each type.

B. Flush Pulls: Zinc die cast metal providing a semi-recessed appearance and comfortable finger grip.

Finger holes or slots machined into doors are not acceptable.

C. Hinges: Brushed stainless steel type, 5-knuckle, frictionless, not less than 2" long with fast pin and rounded ends. Hinges are attached to both door and case with three (3) screws through each leaf. Doors over 36" in height shall be hung using 3 hinges.

D. Door Catches: Adjustable nylon roller type, with strike.

E. Drawer Slides: Manufacturer's standard.

F. Leveling Devices: Zinc plated ½” – 13 UNC threaded bolt type.

G. Shelf Clips: Die formed steel, zinc plated, designed to provide shelf support and adjustments in ½” increments.

H. Removable Core Locks: Cam type with five-pin tumbler, brass with chrome-plated finish; complying with BHMA A156.11, Type E07281.

1. Provide a minimum of two keys per lock and two master keys.

2. Provide on all drawers and doors.

3. Keying: Key all locks alike, regardless of casework type, coordinate with Architect and Owner.

2.06 COUNTERTOP MATERIALS

A. Stainless-Steel Sheet: ASTM A 240/A 240M, Type 304.

2.07 METAL CABINETS

A. Fabrication: Assemble and finish units at point of manufacture. Use precision dies for interchangeability of like-size drawers, doors, and similar parts. Perform assembly on precision jigs to provide units that are square. Reinforce units with angles, gussets, and channels. Except where otherwise specified, integrally frame and weld cabinet bodies to form dirt- and vermin-resistant enclosures. Where applicable, reinforce base cabinets for sink support. Maintain uniform clearance around door and drawer fronts of 1/16 to 3/32 inch (1.5 to 2.4 mm).

B. Base and Tall Cabinets (standard 22” nominal depth):

1. Minimum height, including corner gussets, leveler fully retracted:

a. Base Standing 35.125”

b. Base Sitting 27.5625”

c. Base ADA 32.625”

d. Tall 84.3125”

2. One-piece formed end panels and back with internal reinforcing front posts

3. Front post fully closed with full height reinforcing upright.

4. Shelf adjustment holes in front and rear posts shall be perfectly aligned for level setting, adjustable to 1/2" increments.

5. Base cabinet drawer units provided without backs or bottoms; cupboard units provided with removable backs for service access.

6. Tall cabinet units provided with full formed backs, recessed 1/8” for mounting purposes.

7. One-piece bottom with formed front edge spot welded to front rail. Rabbetted as required for swinging doors and drawers; flush for sliding doors.

8. Top rail interlocks with and welded to end panels, flush with front of unit; reinforced for suspended units.

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9. Formed steel base provides minimum 3.750” high by 3.000” deep toe-kick space; reinforcing corner gussets accommodate standard ½-13 UNC x 2.500” zinc plated leveling bolt, accessible through bottom panel on Base and Tall Cabinets where applied.

C. Wall Cabinets (standard 12” and 16” depth):

1. Standard heights include 18”, 24.5”, 30”, 36”, 42” and 48”.

2. One piece formed end panels and back with internal reinforcing front posts.

3. Front post fully closed with full height reinforcing upright.

4. Shelf adjustment holes in front and rear posts shall be perfectly aligned for level setting, adjustable to ½" increments.

5. One-piece formed back, recessed ¾” for mounting purposes.

6. One-piece top with front edge formed into front rail.

7. One-piece bottom with front edge formed into front rail.

8. Note: All exposed seams on joints will be welded, ground and polished to an equivalent mill finish.

D. Hinged Doors: 5/8” thick, double wall, telescoping box steel construction with interior sound deadening, outer corners fitted smooth. Hinges with screws to internal 14 gauge reinforcement in case and door. Hinges shall be removable; welding of hinges not acceptable. Doors shall close against rubber bumpers.

E. Drawers:

1. Drawer fronts: 5/8" thick, double wall construction, assembled with sound deadened material, top front corners fitted smooth.

2. and sides coved and top edges formed. No sharp edges.

3. No tools required for removal.

4. tested and rated 150 lb. static and dynamic.

5. Provide drawer with rubber bumpers. Friction centering devices are not acceptable.

F. Adjustable Shelves:

1. Casework shelves: Die formed steel, front and back edges formed down and back 1"; ends formed down ¾”.

2. Reinforced shelves: Shelves over 36” long and 16” deep include hat channel reinforcement, full length of the shelf.

G. Toe Space: Fully enclosed, 4 inches (100 mm) high by 3 inches (75 mm) deep, with no open gaps or pockets.

H. Filler and Closure Panels: Provide where indicated and as needed to close all spaces between casework and walls, ceilings, and equipment. Fabricate from same material and with same finish as casework and with hemmed or flanged edges unless otherwise indicated.

2.08 METAL CABINET FINISH

A. Preparation: Metal shall be treated with a heated alkaline based acid solution, rinsed with water, and a coat of epoxy-link applied; immediately dried in heated ovens, then gradually cool prior to application of finish.

B. Application: Electro-statically apply epoxy powder coat of selected color and bake in controlled high temperature oven to assure a smooth, hard satin finish. Surfaces shall have a chemical resistant, high grade laboratory furniture quality finish of the following thicknesses:

1. Exterior and interior surfaces exposed to view: 1.8 – 3 mils.

2. Backs of cabinets and other surfaces not exposed to view: 1.8 mils minimum.

C. Chemical Spot Test :

1. Test procedure: Place test panel on a flat surface, clean with soap and water and blot dry. Condition the test panel for 48 hours at 73°F ± 3°F and 50% ± 5% relative humidity. Panel will be subjected to chemical reagents according to SEFA 8 M-2010 Recommended Practice using one of the following two test methods:

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a. Method A – Test volatile chemicals by placing a cotton ball saturated with reagent in the mouth of a 1-oz. bottle and inverting the bottle on the surface of the panel.

b. Method B – Test non-volatile chemicals by placing five drops of the reagent on the surface of the panel and covering with a 24 mm watch glass, convex side down.

c. For both test methods, leave the reagents on the panel for a period of one hour. Wash off the panel with water, clean with detergent and naphtha, and rinse with de-ionized water. Dry with a towel and evaluate after 24 hours at 73°F ± 3°F and 50% ± 5% relative humidity using the following rating system.

2. Evaluation ratings:

a. Level 0 – No detectable change.

b. Level 1 – Slight change in color or gloss.

c. Level 2 – Slight surface etching or severe staining.

d. Level 3 – Pitting, cratering, swelling, or erosion of coating. Obvious and significant deterioration.

3. Acceptance level: No more than four (4) level 3 conditions

4. Test results: Two (2) level 3 conditions exist.

D. Hot Water Test

1. Test procedure: Hot water (100°C±3%) shall be allowed to trickle (with a steady stream and at a rate of not less than 6 ounces [177.44cc] per minute) on a finished surface, which shall be set at an angle of 45-degrees, for a period of five minutes.

2. Acceptance level: After cooling and wiping dry, the finish shall show no visible effects from the hot water.

3. Test results: The finish shows no visible effect due to the hot water.

E. Finish Impact Test:

1. Test procedure: Position the 18 GA CRS test panel with nominal paint thickness of 3 mils on a smooth concrete floor. A one-pound ball (approximately 2” in diameter) shall be dropped from a distance of 12” onto a flat horizontal surface.

2. Acceptance level: There shall be no visual evidence to the naked eye of cracks or checks in the finish due to impact.

3. Test results: There is no visual evidence of any cracks or checks due to impact.

F. Paint Adhesion on Steel:

1. Test procedure: This test is based on ASTM D3359-02 “Standard Test Methods for Measuring Adhesion by Tape Test 1 – Test Method B”. Two sets of six parallel lines 2mm apart shall be cut with a razor blade to intersect at right angles thus forming a grid of 25 squares. The cuts shall be made just deep enough to go through the coating, but not into the substrate. Brush the grid area lightly with a soft brush, and then place a piece of tape over the grid. Rub the tape firmly with the eraser of a pencil to ensure good contact. Remove the tape by rapidly pulling it back upon itself as close to an angle of 180° as possible.

2. Acceptance level: A 4B rating or better (ninety-five percent or more of the grid area shall show finish intact.

3. Test results: 100% of the squares remained intact after the test.

G. Paint Hardness on Steel:

1. Test procedure: This test is based on ASTM D3363-01 “Standard Test Method for Film Hardness by Pencil Test”. Clip a corner of the sample at 45° exposing a raw metal edge. Place the sample on a raw metal base plate so that the exposed metal edge of the sample makes contact with the turned up side of the base plate. Remove approximately 6mm of wood from a 4H pencil, being careful to leave an undisturbed smooth cylinder of lead. Holding the pencil at an angle of 90° to an abrasive paper, rub the lead against the paper maintaining an exact angle of 90° section until a flat smooth and circular cross section is obtained. On the other end of the pencil remove approximately 13mm of wood from on half of the pencil. Install the pencil into a Sheen model 720N Pencil Scratch Hardness Tester. Follow the manufacturer’s instructions for conducting the test.

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2. Acceptance level: The paint finish shall withstand the abrasion of a 4H pencil without penetrating through to the substrate and completing a continuous circuit.

3. Test results: The 4H pencil did not penetrate the substrate during the test.

2.09 COUNTERTOPS

A. Countertops, General: Provide units with smooth surfaces in uniform plane, free of defects. Make exposed edges and corners straight and uniformly beveled. Provide front and end overhang of 1 inch (25 mm).

B. Stainless-Steel Countertops (SS): Stainless steel tops and working surfaces shall be Type 304 with #4 finish per ASTM A 666, unless otherwise specified. All exposed surfaces shall be 16 gauge stainless steel reinforced on the underside by 16 gauge galvanized steel channels, so spaced as to prevent twisting, oil-canning or buckling. Exposed edges of tops shall be formed into a 1-1/4" channel shape. Splash rails and curbs shall be formed from the same sheet as the top or welded to provide a seamless appearance.

Top edges of curbs and backsplash shall be formed into a channel shape. Where stainless steel sinks are included in the work surface, the sink bowl shall be so welded to the top as to form an integral part thereof. All welds shall be ground smooth and polished to a uniform satin finish over the entire top and sink assembly. Soldering of the sinks, curbs or splash rails to the top shall not be permitted. Mechanical joints or field joints, where made necessary by size, shall be a tight butt joint of the top surfaces, reinforced and held in alignment with steel reinforcements. Underside of tops and sinks shall be spray coated with a sound dampening material.

PART 3 EXECUTION

3.01 INSTALLATION OF CABINETS

A. Comply with installation requirements in SEFA 2. Install level, plumb, and true in line; shim as required using concealed shims. Where laboratory casework abuts other finished work, apply filler strips and scribe for accurate fit, with fasteners concealed where practical.

B. Utility-Space Framing: Secure to floor with two fasteners at each frame. Fasten to partition framing, wood blocking, or metal reinforcements in partitions and to base cabinets.

C. Base Cabinets: Fasten cabinets to utility-space framing, partition framing, wood blocking, or reinforcements in partitions, with fasteners spaced not more than 16 inches (400 mm) o.c. Bolt adjacent cabinets together with joints flush, tight, and uniform.

1. Where base cabinets are installed away from walls, fasten to floor at toe space at not more than 24 inches (600 mm) o.c. and at sides of cabinets with not less than two fasteners per side.

D. Wall Cabinets: Fasten to hanging strips, masonry, partition framing, blocking, or reinforcements in partitions. Fasten each cabinet through back, near top, at not less than 16 inches (400 mm) o.c.

E. Install hardware uniformly and precisely.

F. Adjust operating hardware so doors and drawers align and operate smoothly without warp or bind and contact points meet accurately. Lubricate operating hardware as recommended by manufacturer.

3.02 INSTALLATION OF COUNTERTOPS

A. Comply with installation requirements in SEFA 2. Abut top and edge surfaces true in plane with flush hairline joints and with internal supports placed to prevent deflection. Locate joints where indicated on Shop Drawings.

B. Field Jointing: Where possible, make in same manner as shop-made joints, using dowels, splines, fasteners, adhesives, and sealants recommended by manufacturer. Shop prepare edges for field-made joints.

C. Fastening:

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1. Secure countertops, except for epoxy countertops, to cabinets with Z-type fasteners or equivalent, using two or more fasteners at each cabinet front, end, and back.

2. Secure epoxy countertops to cabinets with epoxy cement, applied at each corner and along perimeter edges at not more than 48 inches (1200 mm) o.c.

3. Where necessary to penetrate countertops with fasteners, countersink heads approximately 1/8 inch (3 mm) and plug hole flush with material equal to countertop in chemical resistance, hardness, and appearance.

D. Provide holes and cutouts required for service fittings.

E. Seal unfinished edges and cutouts in plastic-laminate countertops with heavy coat of polyurethane varnish.

F. Provide scribe moldings for closures at junctures of countertop, curb, and splash with walls as recommended by manufacturer for materials involved. Match materials and finish to adjacent laboratory casework. Use chemical-resistant, permanently elastic sealing compound where recommended by manufacturer.

G. Dress joints smooth, remove surface scratches, and clean entire surface.

3.03 INSTALLATION OF SINKS

A. Comply with installation requirements in SEFA 2.

B. Semiflush Installation of Stainless-Steel Sinks: Before setting, apply sink and countertop manufacturers' recommended sealant under rim lip and along top. Remove excess sealant while still wet and finish joint for neat appearance.

3.04 CLEANING AND PROTECTING

A. Clean finished surfaces, touch up as required, and remove or refinish damaged or soiled areas to match original factory finish, as approved by Architect.

B. Protect countertop surfaces during construction with 6-mil (0.15-mm) plastic or other suitable water-resistant covering. Tape to underside of countertop at a minimum of 48 inches (1200 mm) o.c.

END OF SECTION