Lap Steel and F m13
No bar position in CEGACE spells F m13.
F m13 spells F – G – G# – C – D – D#, but the lap steel chair has no bar for it: at every fret of the CEGACE neck, and on every short slant, the strings that land on its tones leave one out or too few of them ring.
In a country arrangement that is an ordinary night's work — the lap steel plays the part of the chord the bar can reach, or a single-string line through it, and lets the guitar and the rest of the band carry the chord. This page draws no grip a steel cannot hold.