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rail sections
The rail profile is the cross sectional shape of a railway rail, perpendicular to its length.
Early rails were made of wood, cast iron or wrought iron. All modern rails are hot rolled steel with a cross section (profile) approximate to an I-beam, but asymmetric about a horizontal axis (however see grooved rail below). The head is profiled to resist wear and to give a good ride, and the foot profiled to suit the fixing system.
Unlike some other uses of iron and steel, railway rails are subject to very high stresses and are made of very high quality steel. It took many decades to improve the quality of the materials, including the change from iron to steel. Minor flaws in the steel that may pose no problems in other applications can lead to broken rails and dangerous derailments when used on railway tracks.
By and large, the heavier the rails and the rest of the trackwork, the heavier and faster the trains these tracks can carry.
Rails represent a substantial fraction of the cost of a railway line. Only a small number of rail sizes are made by steelworks at one time, so a railway must choose the nearest suitable size. Worn, heavy rail from a mainline is often reclaimed and downgraded for re-use on a branchline, siding or yard.
Hoping someone can really help me out. I'm looking for a couple of the 3.74" Anderson rail sections. These are a few years old and noonger made. I'm trying to get 3-4 of them. These worked on the Anderson 6.83" free float handguard that was discontinued several years ago. Here is a link of...
Authentic Knights Armament Rail Panel Covers-
$75 For All, or- All have been sold EXCEPT 4 of the 11 rib panels
11 Rib- $12, All 4 for 40
BCM Keymod Rail Panel Kit - $10 for all 7
Magpul XTM Handstop Kit - $15
SOLD — MLOK rail section and keymod rail section - FREE W/ purchase of $20 or...