1-274-_FRAME_RAILS_Eng_01_337546871.pdf

This document is a Mack Trucks Product Information sheet dated August 13, 2024, specifically focusing on frame rails for heavy-duty trucks. The document provides technical specifications for frame rails manufactured by Mack, detailing the material composition, dimensional characteristics, and mechanical properties of two different frame rail variants.

The product information covers two sales codes for frame rails: 2741030 (cold formed, 110 kpsi) and 2741031 (heat treated, 120 kpsi). Both variants have identical overall frame width of 864 mm (34.0 inches) and frame height of 260 mm (10.24 inches), with frame flange width of 70 mm (2.76 inches). The key differences are in frame thickness (7 mm vs. 8 mm) and section modulus (11.6 vs. 13.3), with corresponding resisting bending moments of 1,390,000 and 1,600,000 lbs-in. The frame rails are constructed from 760 MPa alloy steel with material hardening processes, ensuring a minimum yield strength of 110 ksi, and are designed to meet diverse application requirements for truck frame construction.