There are no encumbrance rules in the system, because movement does not require the use of a battle mat or minis (so why track encumbrance?).
With many of the other popular rpgs putting more
emphasis on battle mats, grids, combat manuouvers, etc, what made you decide to take a different approach?
Are combat manuouvers purely narrative?
Growing up I never used battle mats or minis in battle. I had fun with such props, but I didn't want to require them in my game. The ERP rules reflect this...
"Movement in ERP is abstract, players describing
such movement as necessary, while the GM tracks
how it will affect actions and timing. Occasionally,
judging movement over distances becomes
important for tactical or dramatic situations...". In the latter case there are rules based on Speed ratings, broken down into battle phases, and it's all very easy to arbitrate.