Louisville Ladder AP5008 300-Pound Duty Rating Aluminum Mobile Platform Ladder, 8-Foot 4 Swivel casters, mounted on a front cam mechanisms and rear springs, make the AP5000 easy to use in material handling applications 300-Pound, load capacity, includes weight of user and tools Heavy gusset bracing, two pairs of steel gussets under bottom step for extra support, heavy duty steel gussets on each angle back brace Slip resistant platform, locks ladder when open The ladder meets or exceeds the safety standards set by ANSI and OSHA