Grid Clearance

I advanced four paces along the corridor baseboard. Forward line intercepted by a flush floor register. Standard obstacle assessment initiated. The rectangular casing is cast iron with a dark finish. Twenty-four parallel louvers form a precise slat grid at ten-millimeter intervals. I placed my left boot onto the outer flange. Zero deflection registered. I advanced across the central crossbar, monitoring load distribution above each opening. A steady upward thermal current rose through the steel channels. Temperature is mild. Air velocity is consistent. I halted at the mid-grid junction and braced both boots across adjacent slats. Subfloor conduit surveyed. Structure holds firm.