Basically in Malaysia, there are 2 types of plan paper storage cabinet which are often used by architects to store and to file their plan paper, horizontal type and vertical type. To my knowledge, there are 3 sizes of plan papers, A1, AO and AQ. AQ is the largest size pl;an paper.
Our horizontal plan paper has 6 drawers, each drawers with a metal flip panel, and central locking system. The material we used is 0.8mm thickness cold roll steel. We can customize or tailor made number of drawers according to client needs.