Navascape Products | MasterFormat Specifications
Section 32 14 13.16 – Concrete Paving Slabs on Roof Decks
Note: This guide specification is for paving slabs supported by pedestals for pedestrian roof plaza decks or with a free draining setting bed and no joint materials. Slabs installed with these methods are not recommended for use in areas subjected to vehicular traffic. The below text must be edited to suit specific project requirements. This Section includes the term “Architect”. Edit this term as necessary to identify the design professional in the General Conditions of the Contract.
PART 1 GENERAL
1.01 SUMMARY
A. The work covered by this section includes the furnishing of all labor, materials, equipment and incidentals for the inspection and construction of paving modules including all details shown on the Construction Drawings and as described by the Contract Specifications. The work in this section consists of, but is not limited, to the following:
a. [Furnishing and placement of bedding sand].
b. [Furnishing and placement of pedestals.]
c. Furnishing and placement of paving modules.
d. [Drainage Mat]
e. [Cleaner, Sealers, Joint Sand Stabilizers, if required]
B. Related Sections
a. Section [ ] – Membrane Roofing
b. Section [ ] – Roof Drains
c. Section [ ] – Roof Accessories
d. Section [ ] – Roof and Deck Insulation
e. Section [ ] – Sheet Metal Flashing and Trim
1.02 REFERENCES
Note: Pavements should be designed in consultation with a qualified civil engineer, in accordance with established pavement design procedures and in accordance with the ICPI Tech Spec technical bulletins. Use the current year reference.
A. American Society of Testing and Materials (ASTM):
a. ASTM C 136 - Method for Sieve Analysis for Fine and Coarse Aggregate
b. ASTM C 979 - Standard Specification for Pigments for Integrally Colored Concrete
c. ASTM D 448 - Standard Classification of Sizes of Aggregate for Road and Bridge Construction
B. Canadian Standards Association (CSA):
a. CSA A231.1 - Precast Concrete Paving Slabs
b. CSA A23.2A - Sieve Analysis of Fine and Coarse Aggregates
C. Interlocking Concrete Pavement Institute (ICPI)
a. Tech Spec Technical Bulletins
1.03 SUBMITTALS
A. In accordance with Conditions of the Contract and Division 1 Submittal Procedures Section
B. Manufacturer’s drawings and details: Indicate perimeter conditions, relationship to adjoining materials and assemblies, [expansion and control joints], [concrete paving slab layout], [patterns, color arrangement], [installation and setting] details.
C. Sieve analysis for grading of bedding sand per [CSA A23.2.2A] [ASTM C136].
D. [Drainage mat sample].
E. Four (4) pedestal samples.
F. Concrete paving slabs:
a. [Two] representative full size samples of each paving slab type, thickness, color, finish that indicate range of color variation and texture expected in the finished installation. Color(s) selected by [Architect] [Engineer] [Landscape Architect] [Owner] from manufacturer’s available colors.
b. Accepted samples become the standard of acceptance for the work.
c. Test results from an independent testing laboratory for compliance of paving module requirements to CSA A231.1 or other applicable requirements.
d. Manufacturer’s catalog product data, installation procedures, and material safety data sheets for the safe handling of the specified materials and products.
G. Paving Slab Installation Subcontractor:
a. A copy of Subcontractor’s current certificate from Interlocking Concrete Pavement Institute Concrete Paving slab Installer Certification Program.
b. Job references from projects of similar size and complexity.
1.04 QUALITY ASSURANCE
A. Paving Subcontractor Qualifications:
a. Installation shall be by a contractor and crew, having successfully completed concrete paving slab installation on projects of similar nature, complexity, or dollar cost.
b. Utilize installer holding a current certificate from the Interlocking Concrete Pavement Institute Concrete Paving slab Installer Certification program.
B. Regulatory Requirements and Approvals: [specify applicable licensing, bonding, etc.]
C. Mock-Ups:
a. Install a 2.0 m x 2.0 m (6 ft x 6 ft) area
b. This area will be used to determine surcharge of the bedding sand layer, [pedestal height and shimming requirements], joint sizes, lines, laying pattern(s), color(s), and texture of the job.]
c. This area shall be the standard from which the work will be judged.
d. Subject to acceptance by the owner, mock-up maybe incorporated into the finished work.
1.05 DELIVERY, STORAGE AND HANDLING
A. General: Comply with Division 1 Product Requirements Section
B. Comply with all manufacturer’s ordering instructions and lead-time requirements to avoid construction delays.
C. Delivery: Deliver materials in manufacturer’s original, unopened, undamaged containers packaging with identification labels intact:
a. Coordinate delivery and paving schedule to minimize interference with normal use of buildings adjacent to paving.
b. Deliver paving slabs to the site in steel banded, plastic banded, or plastic wrapped cubes capable of transfer by forklift or clamp lift.
c. Unload paving slabs at job site in such a manner that no damage occurs to the product.
D. Storage and Protection: Store materials protected such that they are kept free from mud, dirt and other foreign materials [store paving slab cleaners and sealers according to manufacturer’s instructions]
a. Cover bedding sand material with waterproof covering to prevent exposure to rainfall or removal by wind. Secure the covering in place.
E. Coordinate delivery and paving schedule to minimize interference with normal use of buildings adjacent to paving.
1.06 PROJECT/SITE CONDITIONS
A. Environmental Requirements:
a. Do not install bedding material or paving slabs [or pedestals] during heavy rain or snowfall.
b. Do not install frozen aggregate.
c. Do not install paving modules on improperly prepared, frozen, or saturated base material.
1.07 MAINTENANCE
A. Extra Materials: Provide [specify quantities, area, percentage] of additional material for use by owner for maintenance and repair.
B. Paving slabs shall be from the same production run as installed materials.
PART 2 PRODUCTS
2.01 PRECAST CONCRETE UNIT PAVING SLABS
A. Manufacturer
a. Navascape Products: RR#2, 1081 Rife Road, Cambridge ON N1R 5S3, Ph: 800 265 6496
b. Navascape Products: 7447 Bren Road, Mississauga, ON L4T 1H3, Ph: 800 462 8490
B. Precast Concrete Paving Slabs
SmartCast® Diamond 600 x 600 [600 mm x 600 x 40 mm] [23.63 x 23.63” x 1.57”]
SmartCast® Diamond 600 x 750 [600 mm x 750 x 40 mm] [23.63 x 29.53” x 1.57”]
SmartCast® Brick 400 x 400 [400 mm x 400 x 40 mm] [15.75 x 15.75” x 1.57”]
SmartCast® Brick 600 x 600 [600 mm x 600 x 40 mm] [23.63 x 23.63” x 1.57”]
SmartCast® Clean 600 x 600* [600 mm x 600 x 50 mm] [23.63 x 23.63” x 1.97”]
SmartCast® Reflect 600 x 600* [600 mm x 600 x 50 mm] [23.63 x 23.63” x 1.97”]
SmartCast® Diamond Roof 600 x 600* [600 mm x 600 x 50 mm] [23.63 x 23.63” x 1.97”]
*Note: Built-in Pedestal option available
C. Material Standards:
a. Comply with material standards:
i. Meet the following physical requirements set forth in CSA-A231.1, Precast Concrete Paving Slabs:
a. Minimum average flexural strength of three paving modules to be 4.5 MPa with no individual strength below 4.0 MPa tested in accordance with CSA-A231.1.
b. Average loss of three paving slabs not greater than 300 g/m2 (8.85 oz/yd2) after 28 freeze-thaw cycles or 800 g/m2 (23.6 oz/yd2) after 49 freeze-thaw cycles immersed in a 3% saline solution for paving modules.
2.02 PRODUCT SUBSTITUTIONS
A. Substitutions: No substitutions permitted.
2.03 PEDESTALS
A. Provide pedestals installed as necessary as follows:
a. Manufacturer: [Specify manufacturer]
b. Material: [Specify material]
c. Material Standard: [Specify material standard]
2.04 BEDDING MATERIAL
A. Provide bedding material as follows:
a. Washed, clean, non-plastic, free from deleterious or foreign matter, symmetrically shaped, natural or manufactured from crushed rock. Do not use gravel.
b. Conforming to the grading requirements ASTM No. 89 per ASTM D448 and as noted in Table 1 below. Sieve according to [CSA A23.2-2A] [ASTM C136].
Table 1
Grading Requirements for Bedding Material
ASTM No. 89Sieve Size / Percent Passing
1/2 in. (12.5 mm)
3/8 in. (9.5 mm)
No. 4 (4.75 mm)
No. 8 (2.36 mm)
No. 16 (1.18 mm)
No. 50 (0.300 mm) / 100
90 to 100
20 to 55
5 to 30
0 to 10
0 to 5
2.05 GEOTEXTILE
A. Provide geotextile as follows:
a. Material Type and Description: [Specify material type and description]
b. Manufacturer: [Specify manufacturer]
c. Material Standard: [Specify material standard]
2.06 DRAINAGE MAT
A. Provide drainage mat as follows:
a. Material Type and Description: [Specify material type and description]
b. Manufacturer: [Specify manufacturer]
c. Material Standard: [Specify material standard]
Note: Delete article below if cleaners, sealers and / or joint stabilization materials are not specified.
2.07 CLEANERS, SEALERS
A. Provide [cleaner] [sealers] as follows:
a. Material Type and Description: [Specify material type and description]
b. Manufacturer: [Specify manufacturer]
c. Material Standard: [Specify material standard]
PART 3 EXECUTION
Note: The elevations and surface tolerance of the roof deck determine the final surface elevations of the paving slabs. The paving slab installation contractor cannot correct for deficiencies in elevations of the base surface with additional bedding sand or other means. Therefore, the surface elevations of the base should be checked and accepted by the General Contractor or designated party, with written certification to the paving subcontractor, prior to placing bedding materials.
3.01 ACCEPTABLE INSTALLERS
A. [Specify acceptable paving subcontractors]
3.02 EXAMINATION
A. Acceptance of Site Verification of Conditions:
a. General contractor shall inspect, accept and certify in writing to the paving slab installation subcontractor that roof conditions meet specifications for the following items prior to installation of concrete paving slabs.
i. Verify the geotextiles, if applicable, have been placed according to the drawings and specifications.
ii. Verify that roof deck materials, thickness, surface tolerances and elevations conform to specified requirements.
iii. Provide written test results of roof deck materials to the Owner, General Contractor and paving slab installation subcontractor.
iv. Verify location, type, and elevations of edge restraints, drains, drain holes, holes and inlets.
B. Do not proceed with installation of [bedding sand] [pedestals] and concrete paving slabs until roof conditions are corrected by the General Contractor or designated subcontractor.
3.03 PREPARATION
A. Verify that all surfaces, membranes, protection board, insulation, drains, are free from dirt, oil, grease or any deleterious substances and debris which may prevent installation, drainage, and stability of the paving slab installation.
B. Verify that roof deck has a minimum of 2% slope to drains.
C. Do not begin paving work until such conditions have been corrected [to the Architect’s satisfaction] and are ready to receive geotextile, [drainage mat], [bedding materials], [pedestals], and paving slabs.
3.04 INSTALLATION
Note: Some bituminous waterproofing membranes are subject to softening at high ambient temperatures. Protection board is recommended in such situations under pedestal systems to decrease point load pressure on the membrane. Check with the membrane manufacturer for compatibility between the membrane and pedestals. Revise specification to include protection board as required.
A. Spread, join and trim drainage mat according to manufacturer’s recommendations.
B. Spread geotextile and turn up at sides of installation against parapets and protrusions in the roof. Overlap geotextile and drainage mat down slope a minimum of [300 mm] [12’] [as indicated on drawings].
C. Spread and screed bedding material a minimum of 25 mm (1”) thick. Do not disturb.
D. Compact bedding material without damaging the [drainage mat], geotextile or waterproof membrane. Maintain an even surface.
E. Install paving slabs on compacted bedding material in the pattern(s) as shown on the drawings. Maintain joints between the paving slabs between [specify joint width – depends on product selected-contact Navascape Products for recommendations] wide.
F. Fit slabs tightly against parapets, walls, and protrusions in the roof. Cut paving slabs with masonry saw to fit in these areas. [Adjust bond pattern at pavement edges such that cutting of edge paving slabs is minimized. All cut paving slab shall be no smaller than one half of a whole slab.] [Cut paving slabs at edges as indicated on the drawings].
OR
C. Locate pedestals according to manufacturer’s recommendations and as indicated on the drawings.
D. Place paving slabs on pedestals so they are supported according to pedestal manufacturer’s recommendations.
E. Align pedestals in all directions and shim elevation of slabs as work progresses and according to the manufacturer’s recommendations.
F. Trim and remove uncovered portion of pedestals to fit tightly with slabs, parapets, ealls, and protrusions on roof. Cut paving slabs with masonry saw to fit in these areas. [Adjust bond pattern at pavement edges such that cutting of edge paving slabs is minimized. All cut paving slab shall be no smaller than one half of a whole slab.] [Cut paving slabs at edges as indicated on the drawings].
G. Maintain consistent joint widths between the paving slabs [specify joint width – depends on product selected-contact Navascape Products for recommendations].
H. Do not install cracked or broken paving slabs.
I. Remove cut pieces and other debris from the surface and on the roof deck. Sweep slab surface clean.
3.05 FIELD QUALITY CONTROL
A. Check final surface elevations for conformance to the drawings.
B. Lippage: Maximum [3 mm (1/8”) for aggregate base] [1.5 mm (1/16”) for pedestal set] difference in height between adjacent paving slabs excluding natural texture of the paving slab.
Note: Cleaning and sealing may be required for some applications. See ICPI Tech Spec 5, Cleaning and Sealing Interlocking Concrete Pavements for guidance on when to clean and seal the paving slab surface. Delete article below if cleaners or sealers are not applied.
3.06 [CLEANING] [SEALING]
A. [Clean] [Seal] paving slabs in accordance with the manufacturer’s written recommendations.
3.07 PROTECTION
A. After work in this section is complete, the General Contractor shall be responsible for protecting work from damage due to subsequent construction activity on site.
END OF SECTION
Concrete Paving Slabs on Roof Plaza Decks Page 3