"You architects keep finding our ghosts," he said. He led Mara down a service corridor into a shaft of dust and green paint flakes. The stair — the double stringer — sat exposed in the atrium like a ribcage. No treads. The stringers arched two parallel bones from mezzanine to landing, bolts like teeth.
: Details on how the treads are mounted—whether they are "raised" on top of the stringers or "concealed" between them for a sleeker profile. Structural Connections
Include a 1-inch nosing if the treads are solid. 3. Connection Details (The "Callouts")
If using timber treads, show the countersunk wood screws from the underside. Best Practices for Organizing Your DWG File
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