Platforms and mezzanines offer extra height for storage, work, security, or improved traffic flow in a facility. Mezzanines create an extra level inside a facility to gain additional floor space for work or storage. Viewing and guard platforms provide a wide field of view over indoor or outdoor areas for security or observation purposes. Crossover platform systems facilitate movement to work areas over obstructions. Rooftop platform systems are walkways that install on commercial membrane roofs without damaging them. Multi-level platform access systems allow complete customization to meet height, width, or distance needs.