The expansion/contraction effect from heat/cold and humidity on the length of boards are negligible. You must account for it on the width which is why they cut the wide grooves for the bed runners.
Last edited by Phak1; 06/11/202512:16 PM. Reason: Typo
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum
