Why access mattered here
Campus buildings often combine older construction with additions built over different decades, and the resulting gaps are not always a single hole. A long, continuous opening spread across an entire elevation needs more than one exit point, and it needs an access method that can reach the full length of the gap, not just the section closest to a door or a roof hatch.
On this project, the affected platform could not be reached through the building or from a standard lift position. The opening itself ran about 300 linear feet, long enough that a single one-way door at the most visible spot would have left most of the gap untreated.
How the team approached it
For a gap this long, the planning question was not just how to reach it, but how to treat the entire length consistently. The team's rope setup uses Petzl descenders, ASAP secondary devices, 10 mm or 11 mm rope, and full primary and secondary lines under the company's OSHA-aligned rappelling procedures.
Applied to this university facility, that meant positioning technicians directly along the inaccessible platform so the crew could inspect and treat the gap section by section instead of relying on intermittent views from below.
The access plan
The crew rappelled to the platform and worked the rope system along its full length, placing one-way doors at approximately 15-foot intervals across the roughly 300-linear-foot opening so the colony had multiple exit points rather than a single bottleneck.
Sequence of verified work
- Rappelled to the otherwise inaccessible platform
- Inspected the full length of the roughly 300-linear-foot opening
- Placed custom one-way doors at approximately 15-foot intervals along the gap
- Allowed the colony to exit through the distributed openings
- Returned after the exit period to complete the final closure
The result
Spacing the devices across the full 300 feet, instead of concentrating the work at one end, meant the colony had an exit near wherever it was actually roosting along the platform.
The property reported zero callbacks over the three years following the exclusion, a result that held up well beyond the company's standard two-year warranty period.
What property teams can learn
General guidance for any property, not specific claims about this project.
- A long or continuous opening usually needs multiple exit points, not one device at the most convenient location.
- Ask how an access method reaches every section of a gap, not just the part visible from the ground or from a single anchor point.
- Rope-access equipment rated for full primary and secondary lines allows a crew to stop and inspect wherever the gap actually runs, which matters on irregular campus construction.
- A callback rate over multiple years is a more useful proof point than a single-season result. Ask a contractor what happened after the warranty period ended, not just what the warranty covers.