Standard or specification
DTNI-3C, Mise en oeuvre des pavés et des dalles en béton ou en pierre naturelle sur lit de pose granulaire
Ville de Montréal
City of Montreal standard technical document for public works. Read in full by the research. The most complete public Quebec specification found.
Open the source- Published
- October 3, 2024
- Consulted
- October 10, 2026
- Region
- montreal
- Language
- fr
Cited by
Guides
- Building a paver or slab patio
- Building a paver walkway
- Building a paver driveway
- Building a paver pool deck
- Building a block garden wall or retaining wall
- Building outdoor block or slab steps
- Before you dig: locates, permits and property lines
- Choosing a contractor and reading a quote
- Yard drainage: slopes, downspouts, French drain, catch basin and dry well
- Grading the yard around your house
What we take from it
- Isolation joint through the full paver thickness against any fixed element founded below frost.
- Montreal specifies a non-woven geotextile to BNQ 7009-210.
- Montreal targets 95% of modified Proctor, a water content near optimum, and forbids placing frozen aggregate.
- Bed of 25 mm plus or minus 10 mm of manufactured sand; low spots in the base are not filled with sand.
- Check joint lines with a string every 4 to 5 m; a cut piece keeps at least one full original side.
- At least two plate passes with a pad before jointing and at least three after, in different directions; no compaction near an unrestrained edge.
- Polymeric sand on dry pavers and joints, excess removed before activating with water.
- Height difference between neighbouring units of at most 2 mm (1.5 mm for unchamfered units) in City work.
- On a concrete base, Montreal provides for a thinner bed and drain holes of about 50 mm covered with geotextile.
- The most complete public Quebec specification found for laying pavers and slabs on a granular bed; the reference for tolerances, bedding, compaction and joints.
- Reference for bedding, compaction, isolation joints and tolerances.
- In City work, a paver is at least 60 mm thick.
- A 20 to 25 kN plate with a pad for pavers under 100 mm, 35 to 60 kN for pavers of 100 mm and more.
- Reference for bedding, plate force by paver thickness, cuts and tolerances.
- Reference for bedding, compaction, joints and tolerances.
- The City of Montreal compacts the granular base close to its optimum moisture content.
- Montreal requires an isolation joint through the full paver thickness where paving meets a fixed element founded below frost.
- Montreal requires an isolation joint between paving and any fixed element founded below frost.
- Montreal forbids placing frozen aggregates.
- Montreal requires a non-woven geotextile (BNQ 7009-210), a manufactured bedding sand and dry joints when filling.