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RP-13.8 Flangeway Flares
Note **
The Flare leading into the flangeway formed by Guard and Wing Rails may be made by bending the end of the rail, by machining a Bevel, or by a combination of both Bend and Bevel.
Regardless of the method used, the total 'Gather' of the Flared Flangeway must meet the requirement of STANDARD S-3, Note 5, of 1.5 x Fmax. To meet this requirement the total Flare [37] at each end must not be less than the amount shown in the Table.
| SCALE {36] | FLARE Length [36] | Minimum Length [37] |
|---|---|---|
| O | 3/8" | .045 |
| S | 9/32" | .037 |
| On3/OO | 15/64" | .032 |
| HO | 13/64" | .030 |
| Sn3 | 3/16" | .030 |
| TT | 5/32" | .025 |
| HOn3 | 5/32" | .020 |
| N | 7/63" | .015 |
For the Bend & Bevel Method, bend the rail at a distance [32] from the end for an amount [38] of half dimension [37]. Then taper the Bevel from full dimension [37] at rail end to nothing at distance [31] (see RP-13.6).
To prevent snagging of dragging equipment. Guard and Wing Rail open ends may be lengthened a scale 3 1/2" with a 45 degree chamfer of this amount on each end.
** Note: Circled numbers on the drawing are represented by numbers in brackets in the text. [37] represents the number 37 in a circle.