. Railroad structures and estimates . . to to to $12 at U per lb.$ per turnout Stub switch $ to $ New main line split Main line switch (split).. Switches in large Taking up and relaying switch to New main line slip switch (single)New main line slip switch (double) to to Tie rods (6) Slip switch, single Slip switch, double to Tie plates or rail braces 15f* to 216 POINT SWITCHES. Point Sicitches. — IGJ ft. switch point is recommended by theA. R. E. A. for Xo. 8 frog: 22 ft
. Railroad structures and estimates . . to to to $12 at U per lb.$ per turnout Stub switch $ to $ New main line split Main line switch (split).. Switches in large Taking up and relaying switch to New main line slip switch (single)New main line slip switch (double) to to Tie rods (6) Slip switch, single Slip switch, double to Tie plates or rail braces 15f* to 216 POINT SWITCHES. Point Sicitches. — IGJ ft. switch point is recommended by theA. R. E. A. for Xo. 8 frog: 22 ft. for Xo. 11 and 33 ft. for Xo. 16. In choosing the length of a switch, it will be noted that thedegree of turnout curve tends to increase as the switch lengthincreases, with reference to a particular frog; the longer theswitch length, however, the easier will be the change in directionfor comfortable passenger service. Head of point rails planed dovn from C to DPcints jlower than stock rails Point nils lerel •■^th stxi rsiljA-. Pil«JCoU5£ _ ?: >.. iB«dG»age53^ 1^.—^§: w SECTION OF SWITCH RAIL AT EJ ,]?ip«CoO»r 2 loeg _, PUnsd to at Bill ( .SuUot ai Hm* Boek oxat l>» n«m«d a. Biil ^-T5Vts—/jr^Tri/ioaiiie i:v6dt»rifcg»t Pije C<iU«r 3 e—^»il —^ MSdia. fol Si lbs, ^/ISffla, Ibi Si Ib«J I t|<ii».l«i lbs. ] l^ lbs. HEEL BLOCK ^ SECTICN Fig. 66. P. R. R. Standard IS-ft. Point Switch for 85- and 100-lb. Rails BILL OF MATERL\L. No. ofpieces. Description. 225 8 Switch point rails (with foot guards, sockets and bolts complete).Switch plates (complete). Adjustable braces (with bolts, nut locks, double nuts and mal-leable washers).Rods (complete). If heel blocks are desired the following must be included: Heel blocks (with bolts and pipe collars complete).Splices (bent and reamed as shown). SWITCH STANDS. 217 From a theoretical standpoint, the ideal relation exists whenthe switch angle is no greater
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