Build Outdoor Steps with Block, Stone, or Pavers

A. Finished Project Specification

Deliverable: one small outdoor step or two-step practice assembly built from the approved block, stone, or paver step system, connecting the confirmed bottom finished elevation to the confirmed top finished elevation, with uniform riser height, uniform tread depth, full riser and tread support, specified adhesive, pin, or connector installation, approved tread drainage slope, and a documented final safety inspection.

B. Step Geometry and Support Schedule

Element	Required Condition	Source
Total rise	Confirmed top and bottom finished elevations; total rise recorded on the worksheet	Field measurement against Chapter 1 elevations
Riser height	Uniform across all risers within the approved design's stated tolerance	Calculation: total rise ÷ approved riser count
Tread depth	Uniform across all treads within the approved design's stated tolerance	Approved step design
Nosing	Consistent projection at every tread edge per the approved design	Approved step design
Base	Excavated and compacted subgrade with aggregate base at the approved thickness and compaction	Chapter 4 excavation and compaction procedure
Riser connection	Adhesive, pins, or connectors installed per manufacturer instructions	Manufacturer instructions for selected riser units
Infill	Approved aggregate placed and compacted behind each riser in controlled lifts	Approved step design
Tread drainage	Every tread sloped per the approved design to shed water away from the riser below	Approved step design
Handrail/guard trigger	Evaluated against adopted code; referred if triggered	Adopted code and approved design

C. Governing Document Checklist

• Approved step design: confirms total rise, riser count, tread depth, width, landing, nosing, drainage, slip, handrail, guard, and lighting requirements.
• Chapter 1 readiness plan: confirms top and bottom finished elevations and adjacent door, gate, and walkway clearances.
• Manufacturer instructions: confirm adhesive, pin, or connector specifications for the selected riser and tread units.
• Adopted code: confirms rise, run, handrail, guard, lighting, and permit requirements applicable to the project location.

D. Acceptance Standards

Check	Standard
Riser uniformity	Every riser height is within the approved design's stated tolerance of every other riser in the flight
Tread uniformity	Every tread depth is within the approved design's stated tolerance of every other tread in the flight
Level and support	Every riser and tread unit is level, fully supported, and free of rocking
Drainage	Every tread sheds water per the approved slope with no ponding against the riser above
Connection	Adhesive, pins, or connectors installed per manufacturer instructions and cured for the stated time before use
Code triggers	Every handrail, guard, or lighting trigger identified in Section H below is referred, pending, or resolved
Final inspection	Geometry, level, slope, nosing, support, slip resistance, edge condition, and transitions are documented and signed before opening to use

E. Preparation — Confirm Elevations and Calculate Geometry

1. Review total rise, number of risers, tread depth, width, landing, nosing, drainage, slip, handrail, guard, and lighting requirements. Record each value from the approved step design on the Step Geometry Record.
2. Confirm the approved step system and support detail. Verify the selected riser and tread units and their manufacturer-specified connection method match the approved design.
3. Verify top and bottom finished elevations. Measure both elevations in the field against the fixed reference established in the Chapter 1 readiness plan and record the confirmed total rise.
4. Calculate uniform riser height and tread depth from the approved design. Divide the confirmed total rise by the approved number of risers, and record the resulting riser height alongside the approved tread depth.
5. Do not proceed if geometry cannot meet the required limits. If the calculated riser height or the approved tread depth falls outside the approved design's stated tolerance, stop and refer the design to the required qualified professional before continuing.

F. Layout and Base Preparation

1. Locate utilities and verify door, gate, wall, and walkway clearances. Confirm the step footprint does not conflict with a marked utility or a required clearance recorded in the Chapter 1 readiness plan.
2. Lay out the step footprint. Mark the footprint boundaries, riser lines, and landing area using the confirmed geometry and reference lines from Chapter 3 where the steps connect to an existing walkway or patio layout.
3. Excavate and prepare the approved base. Excavate to the approved depth using the Chapter 4 procedure, removing organics, roots, soft soil, and debris from the step footprint.
4. Compact subgrade and aggregate in lifts. Compact the subgrade, then place and compact aggregate base material in approved lifts to the specified thickness and elevation for the first riser.

G. Riser and Tread Construction

1. Set the first riser units to line, level, elevation, and full support. Position the first riser course on the compacted base at the calculated riser-height elevation, checking line and level continuously.
2. Install specified adhesive, pins, or connectors. Apply the manufacturer-specified connection method for the riser units before infill placement.
3. Place and compact infill behind the riser. Place the approved infill aggregate behind the riser in controlled lifts and compact each lift without displacing the riser.
4. Install tread base or units with full support. Set the tread base or tread units on the compacted infill and riser bearing surface, confirming full contact with no unsupported edges.
5. Maintain approved tread slope for drainage. Check the tread slope against the approved design and adjust bedding or base support until the slope sheds water away from the riser above.
6. Set the next riser where included. Repeat the riser-setting procedure for each additional riser in the flight, checking each course against the story pole.
7. Maintain uniform finished rise and run. Compare each completed riser height and tread depth against the Step Geometry Record and correct any unit that falls outside the stated tolerance before continuing.
8. Install tread caps, pavers, or stone with secure bearing and consistent nosing. Set the finished tread surface using the specified adhesive or bedding method, maintaining consistent nosing at every step.
9. Preserve movement and drainage details. Maintain any specified joint, movement, or drainage detail between tread units and between the step assembly and adjoining hardscape.

H. Cure, Code Triggers, and Final Inspection

1. Barricade the steps during adhesive cure or stabilization. Install barricades and warning signage and restrict access until the manufacturer-stated cure time has elapsed.
2. Inspect geometry, level, slope, nosing, support, slip, edge condition, guard or handrail trigger, and transitions. Complete the Step Safety Inspection Checklist against the Acceptance Standards table.
3. Correct unsafe conditions before opening to use. Correct any riser, tread, support, drainage, or code-trigger deficiency identified during inspection, and reinspect the corrected condition.
4. Document final measurements. Record final riser heights, tread depths, slope readings, connection method, cure time, and inspection results on the worksheet.