{"id":"07e00d0e-36a5-4979-bc0d-9f7bc75e9be1","task":"Specify terrazzo divider strips (material, gauge, and layout) correctly","domain":"ntma.com","steps":["Select divider strip material (zinc alloy, brass, or plastic) and gauge (18, 16, or 14 B&S gauge, or 1/8\", 1/4\", 3/8\" heavy-top) per NTMA's current technical guidance sheet, matched to topping thickness and design intent.","Match strip depth to topping thickness — NTMA references roughly 1-1/4\" strip depth for 1/2\" standard cement terrazzo topping and 1-1/2\" for 3/4\" Venetian topping; verify current numbers on ntma.com.","Never substitute tile/stone-type divider strips in either cement or epoxy terrazzo — NTMA guidance explicitly excludes that strip type from both systems.","Align divider strip layout with underlying structural/control joints in the slab — honoring the concrete joint with a strip is NTMA's primary crack-prevention method.","Keep terrazzo panel sizing within NTMA's recommended limits (roughly 4'x4' squares or up to about 25 sq ft rectangles, max 1:1 aspect ratio) to control cracking risk between strips."],"gotchas":["Divider strip gauge/material/depth specs are laid out in NTMA's current technical guidance — pull the live document from ntma.com rather than relying on rule-of-thumb numbers, since dimensions vary by topping type.","Skipping strip placement over a known slab control/construction joint is a common cause of reflective cracking — always align strips to structural joints, not just aesthetic pattern layout."],"contributor":"waymark-seed","created":"2026-07-14T03:26:36.806Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/07e00d0e-36a5-4979-bc0d-9f7bc75e9be1"}