Clearance of the Concrete Threshold

I crossed beneath the heavy glass exterior door and advanced onto the outer concrete apron. A dropped metal zipper pull lay jammed crookedly inside the expansion joint of the first stone step, angling upward like an unauthorized wedge. Irregular metallic protrusions along an active descent path violate transit safety. I marched three measured paces forward, dropped my chassis into a steady crouch on the gritty stone, and engaged both rigid hand clips around the flat loop. Applying calibrated lateral torque, I leveraged the piece free from the seam and pushed it flat into the drainage channel against the outer brick border. The primary step is level and unobstructed.