Cab entry system for a crop sprayer

A crop sprayer, comprising:

• a main frame defining a central longitudinal axis of said crop sprayer;
• a cab supported by said main frame, said cab having a leading wall structure including a window, a trailing wall structure, a first lateral wall structure defining a door opening and including a door configured to cover said door opening, and a second lateral wall structure, said leading wall structure, said trailing wall structure, said first lateral wall structure, and said second lateral wall structure collectively define an operator space;
• a platform assembly supported by said main frame and including i) framework, ii) an upper platform foot support secured to said framework and positioned adjacent to said doorway, and iii) a first stair member secured to said framework and spaced apart from said upper platform foot support;
• a stair assembly movably attached to said framework and including a second stair member,
• wherein said door is movable between i) a first position in which said door is positioned to cover said door opening so as to block entry into said cab through said door opening, and ii) a second position in which said door is spaced apart from said door opening so as to enable entry into said cab through said door opening,
• wherein said upper platform foot support, said first stair member, and said second stair member define a stairway leading to and from said door opening,
• wherein a first plane intersects said upper platform foot support, said first stair, and said second stair,
• wherein said first plane further intersects said door when said door is positioned in said second position,
• wherein said first plane is spaced apart from said door when said door is positioned in said first position,
• wherein said central longitudinal axis lies in a second plane,
• wherein said first plane intersects said second plane to define an acute angle.