Roman Pisa and Pisa2 Step Installation

The “Cut” Method

With the “cut” method, a gravel base is used under each stair. An advantage to this procedure is that it allows you to adjust the height of the rise. Generally, 6" to 8" is acceptable, although local building codes may specify the required height. The depth of the excavation will depend on the height required for the risers and the coping style used. The height of the first riser should measure from the top of the tread to the finished grade.

Pisa2/Roman Pisa - Risers are constructed using a Pisa2 or Roman Pisa Stretcher, a Full Cap and a coping unit for the tread, although you can choose to use Full Caps as the tread if desired. Depending on the style you use, you must then determine the height of the rise. Start by building corners, as described in the Corner Section, on each side of the stairs. To construct the side walls, we recommend using Full Caps to avoid the automatic step-back created by the tongue and groove molded into the Stretcher units. Lay all the courses in the side walls vertically, with no set-back. Be sure to bond the units together with SRW Adhesive. Backfill with 3/4" stone as you go up, and don’t forget to use filter fabric to keep the soil from infiltrating the stone. Once the side walls have been erected, you can start the stairs at the front or set them in from the corners. The depth of the excavation will depend on the height required for the risers and the coping style used. The height of the first riser should measure from the top of the tread (or Full Cap if a coping unit is not used) to the finished grade. Install and compact a 6" gravel base as the footing. Place a row of Stretchers onto the base and carefully level them front to back and side to side. Next, place the second course using Full Caps. Construct the next riser assembly by placing and compacting another 6" thick gravel footing behind the first course of units. Now position a row of Stretchers onto the base and position them directly behind the Full Caps in front. Complete the riser by placing Full Caps for the second course. Install successive risers in the same manner for the number of stairs needed.

Treads

Once the stair risers have been constructed, you will need to set the treads. Adhere the style coping unit you have selected with SRW Adhesive as instructed in Section 7 - Capping the Wall. Position the treads to provide a 1" overhang. Allow the adhesive to cure at least 24 hours before opening the stairs to traffic.

Other Step Options with Pisa2 and Roman Pisa

Perpendicular - This structure is simply a wall with an inside and an outside corner, and the courses of the wall between the two corner step back at 12" per course. Install the units for the riser courses as previously explained, then finish by placing our Universal Coping Stones for the treads.

Outset steps - This structure is constructed in the same manner as the perpendicular steps, one course at a time. However, with this arrangement, it is necessary to construct two inside corners, and two outside corners. To avoid a step-back, use only Full Cap units for the side walls, making sure to adhere them with SRW Adhesive. Otherwise, the side walls will batter toward each other by 3/4" inch per course and each riser will be 11/2" narrower than the course below.