Close-up of structural clay tile or hollow-tile coursework in the Hoffmann-Hayman factory masonry, photographed 24 October 2014 (iPhone 5) — terracotta-red extruded units bedded in coarse buff-grey mortar, one vertical tile face carrying a raised manufacturer stamp reading **FRASER CLAY** in vertical capitals, with horizontal ribbing visible on an adjoining unit — the same hollow structural clay tile family already visible in cross-section in the [second-floor expansion hole through the 1932 exterior wall](/assets/images/gallery/factory-upstairs-expansion-hole-through-original-exterior.jpg), here documented in situ with a readable supplier mark
, here documented in situ with a readable supplier mark](/assets/images/gallery/20141024-factory-fraser-clay-structural-tile.jpg)