For the outside door entrance we installed a Trench Drain, which is used for "above ground" water, clearly an issue in the stairwell. Because we knew this would continue to be an ongoing, major issue, we installed a "dual" Trench Drain, one on the inside and one on the outside, and connected both to the WaterGuard. This ensured the capture of all water in even the most severe weather conditions.
The landing had custom brick pavers in the design. We numbered the pavers to be removed to ensure that when we replaced them after the installation of the Trench Drain they would look untouched.