Upward-angled photograph on the **second floor** of the Hoffmann-Hayman factory — **gas piping** run **against the underside of the ceiling** (paired large **circular cast-iron gate-valve handwheels** bolted onto flanges on a horizontal galvanized or black iron header that Tee-branches upward to a capped vertical stub alongside elbows and screwed couplings); the metal carries decades of oxidation, flaky old paint residue, and plant grime typical of untouched upstairs mains; the upper field reads as rough dark plank or board ceiling soffit and the lateral wall backdrop shows corrugated or rib-pattern industrial cladding, with thin flexible cabling crossing behind mid-frame above a ribbed masonry or block-face lower wall — photographed **1 December 2014** (iPhone 5); **companions** elsewhere on second-floor plant services include the separately documented **[northwest-corner gas shutoff on a vertical riser](/assets/images/gallery/factory-upstairs-northwest-corner-gas-valve.jpg)** (5 January 2025), a physically different vantage on the upstairs gas installation