- Shawnee Pre-cast Concrete Steps Ideal for the home, cottage, or terrace. Available with various finishes and railings. Protected from damages caused by snow melters such as salt or calcium chloride. Available with electrically heated snow melting mats. Commercial Stairs Shawnee's 7/11 step has a 7" rise and 11" tread to comply with local building codes for commercial construction. Handicapped Accessibility Ramps Shawnee combines concrete ramp sections and 7/11 steps to meet the building requirements for commercial and residential installations High Rise Stair Systems Stairs for high rise buildings that are designed to be erected as the building is erected. All pre-finished before installation, Shawnee high rise stairs provide immediate access to all floors. PermEntry Cellar Entryways A pre-cast cellar entryway complete with cast-in-place treads and risers. Unit comes complete with a PermEntry steel bulkhead. Precast Concrete Boat Ramps Pre-cast concrete boat ramp slabs provide easy installation of boat ramps to boating waters. Concrete Fire Cisterns, Fire Cisterns are reliable year round water sources for firefighting, often required when there is no central piped water supply in the area.