{"product_id":"lineside-gradient-sign-posts-oo-gauge-pack-of-8","title":"Lineside Gradient Sign Posts - OO Gauge (Pack of 8)","description":"\u003cp\u003eAdd a bit of detail to your lineside with Gradient sign posts.\u003cbr\u003eSupplied in a packs of 8 sign posts with a variety of gradients.\u003cbr\u003eOO Gauge\u003c\/p\u003e\u003c!--split--\u003e\u003cp\u003eGradient sign posts\u003cbr\u003eSupplied in a packs of 8 sign posts with a variety of gradients \u003cbr\u003eOO Gauge\u003cbr\u003eThe numbering on each post is slightly raised to allow it to be picked-out in black on each sign post.\u003cbr\u003e\u003cbr\u003eGradients on the railway are rarely constant over any considerable length, and may change several times within the space of a mile.\u003cbr\u003eGradient signs were first used around 1850 with a sign placed at each location where the gradient of the line changes. Most gradient sign posts located on the lineside have two arms facing the track, one on either side of a post. The arms slant up or down to indicate the direction of the gradient, and have the gradient marked on them.\u003cbr\u003eThe gradient is expressed as a ratio, e.g. \"1 in 200\" (or \"1:200\")that means that the track rises (or drops) one unit for every 200 units travelled horizontally.\u003cbr\u003e1 in 200 is therefore a steeper gradient than 1 in 500.\u003cbr\u003eSome designs of gradient sign post do not show the first part of the ratio so 1 in 200 is shown merely as “200”.\u003cbr\u003eIn general gradient sign posts are painted white with black lettering, however from the 1970s onwards some are painted yellow.\u003c\/p\u003e","brand":"West Hill Wagon Works","offers":[{"title":"Default Title","offer_id":55627876958583,"sku":"4WH0600701","price":4.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0938\/4175\/2439\/files\/295.jpg?v=1755602364","url":"https:\/\/www.whww.co.uk\/products\/lineside-gradient-sign-posts-oo-gauge-pack-of-8","provider":"West Hill Wagon Works","version":"1.0","type":"link"}