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2. Tell-tale (bridges) - Wikipedia

   en.wikipedia.org/wiki/Tell-tale_(bridges)

   A tell-tale warning of a low clearance over a road. A tell-tale, also known as a bridge warning, is a series of ropes suspended over railway tracks to give warning to the engineer, and more importantly the brakeman who may be scampering across the tops of the cars, that the train is approaching a low-clearance obstacle, such as a tunnel or a bridge.

3. Clearance (civil engineering) - Wikipedia

   en.wikipedia.org/wiki/Clearance_(civil_engineering)

   In civil engineering, clearance refers to the difference between the loading gauge and the structure gauge in the case of railroad cars or trams, or the difference between the size of any vehicle and the width/height of doors, the width/height of an overpass or the diameter of a tunnel as well as the air draft under a bridge, the width of a lock or diameter of a tunnel in the case of watercraft.

4. Structure gauge - Wikipedia

   en.wikipedia.org/wiki/Structure_gauge

   Eurocode 1: Actions on structures has a definition of "physical clearance" between roadway surface and the underside of bridge element. The code also defines the clearance that is shorter than the physical clearance to account for sag curves, bridge deflection and expected settlements with a recommendation of minimum clearance of 5 metres (16 ft 5 in). [2]

5. Double-stack rail transport - Wikipedia

   en.wikipedia.org/wiki/Double-stack_rail_transport

   CSX lists three clearance heights above top of rail for double stack service: [8] Doublestack 1 — 18 ft 2 in (5.54 m) [8] Doublestack 2 — 19 ft 2 in (5.84 m) [8] Doublestack 3 — 20 ft 2 in (6.15 m) [8] Doublestack 4 — 20 ft 3 in (6.17 m) [9] The last 2 clearances offer the most flexibility, allowing two high cube containers to be stacked.

6. Loading gauge - Wikipedia

   en.wikipedia.org/wiki/Loading_gauge

   The main platform is defined to have a height of 1,100 mm (43.3 in) at a distance of 1,920 mm (75.6 in) from the center of the track to allow for trains with profile T. Low platforms at a height of 200 mm (7.9 in) may be placed at 1,745 mm (68.7 in) from the center of the track.

7. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!