Section 3 Dimensions COMPONENTS This section includes detail drawings and charts showing particular vehicle components with dimensions in inches and (millimeters). They illustrate important measurements critical to designing bodies of all types. See the “Table of Contents” at the beginning of the manual to locate the drawing that you need. Frame Rail Configurations - T170/270/370 Note: Bottom of frame rail is a reference point that you can use to determine estimated heights of components and ground clearances. W T Rail Heat Treated H Optional Insert, Heat Treated Shown Figure 3-8. Frame Rail Dimensions and Properties [inches (mm)] TABLE 3-7. Frame Rail Properties (1) Yield Strength:
120,000 PSI (2) Frame rails and inserts are heat treated. (3) Full inserts start ahead of the steering gear and end at the end of frame. (4) Partial inserts start 25 inches behind the center line of the front axle and end at the end of the frame. 3-9 12/11 Frame Rail or Insert (1)(2) Model Section Modulus per Rail, cu.in. RBM per Rail lbs-Inch Weight per Inch per Pair, lbs Height H, inch (mm) Flange Width W, inch (mm) Thickness T, inch (mm) 9-7/8 Frame Rail T170/T270 9. 88 1,251,767 2. 10 9. 88 (251) 3. 46 (87. 8) 0. 25 (6. 4) 10-5/8 Frame Rail T270/T370 14. 8 1,776,000 2. 90 10. 63 (270) 3. 46 (87. 8) 0. 31 (7. 9) 10-3/4 Frame Rail T270/T370 17. 8 2,132,000 3. 50 10. 75 (273) 3. 46 (87.
8) 0. 38 (9. 5) 9-7/8 Insert ONLY for 10-5/8 Frame Rail (2)(3) T270/T370 9. 57 1,149,000 2. 00 9. 88 (251) 2. 88 (73. 0) 0. 25 (6. 4) 10-5/8 Frame Rail with 9-7/8 Insert T270/T370 23. 4 2,925,000 4. 96 10. 63 (270) 3. 46 (87. 8) 0. 56 (14. 3) 10-3/4 Frame Rail with 9-7/8 Insert T270/T370 27. 4 3,281,000 5. 50 10. 75 (273) 3. 46 (87. 8) 0. 63 (15. 9)