{"product_id":"kato-2-252-ho-unitrack-superelevated-concrete-ties-31-1-8-radius-easement-curve","title":"KATO 2-252 HO Scale Unitrack R790mm (R31-1\/8\") Superelevated Concrete Tie Easement Curve","description":"\u003cp\u003eThe \u003cstrong\u003eKATO 2-252\u003c\/strong\u003e is a premium HO Unitrack \u003cstrong\u003esuperelevated easement curve\u003c\/strong\u003e at 790 mm radius, with grey \u003cstrong\u003econcrete ties\u003c\/strong\u003e on grey ballast roadbed — a single track piece that combines progressive-radius easement geometry with banked outer rail.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eEasement curve:\u003c\/strong\u003e A track section whose radius increases progressively from one end to the other, providing a smooth transition between tangent (straight) track and a full-radius curve. Easements reduce lateral jerk on long passenger and freight equipment, allow higher speeds through curves, and reproduce real-railroad spiral-curve engineering on Class-1 mainlines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSuperelevation:\u003c\/strong\u003e Banking of the outer rail above the inner on a curve — the same engineering used on prototype high-speed mainlines (Shinkansen, NEC, BNSF Transcon) to neutralize lateral force from centripetal motion. KATO's superelevated curves let trains lean realistically through the apex.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKATO HO Unitrack system:\u003c\/strong\u003e Code 83 nickel-silver rail molded into a factory-attached ballasted plastic roadbed, with integrated UniJoiners. Layouts assemble five to ten times faster than sectional or flex track.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eScale:\u003c\/strong\u003e HO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRadius:\u003c\/strong\u003e 790 mm \/ 31-1\/8′′\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Superelevated easement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTies:\u003c\/strong\u003e Concrete (grey)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePairs with:\u003c\/strong\u003e #2-250 (standard R790)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 2-252\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KATO","offers":[{"title":"Default Title","offer_id":45099224662198,"sku":"381-2252","price":21.68,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0718\/5131\/1286\/files\/57_34049973-bd6c-4d2f-882a-fbd4b55c58ff.jpg?v=1777656142","url":"https:\/\/oakvillemodeltrains.com\/products\/kato-2-252-ho-unitrack-superelevated-concrete-ties-31-1-8-radius-easement-curve","provider":"Oakville Model Trains Depot","version":"1.0","type":"link"}