A method for determining a load supported by a work platform of a lift device, the method comprising: providing the lift device including the work platform and a linear actuator (26, 326) configured to support and selectively move the work platform between a raised and a lowered position, the linear actuator (26, 326) having an electric motor and an electromagnetic brake; disengaging the electromagnetic brake of the linear actuator (26, 326); maintaining a height of the work platform using the electric motor of the linear actuator (26, 326); determining a motor torque applied by the electric motor; determining an actuator force applied by the linear actuator (26, 326) to the work platform based on the motor torque applied by the electric motor; determining the height of the work platform; and determining the load supported by the work platform based on the actuator force applied to the work platform and the height of the work platform, wherein the motor torque is determined based on at least one of a measured motor current of the electric motor, a measured motor slip of the electric motor, a motor type of the electric motor, a winding density of a coil of the electric motor, and a winding material of the coil of the electric motor, wherein the lift device is a scissor lift having a foldable series of linked support members (25, 325) and the height of the work platform is determined based on a lift angle of at least one linked support member (25, 325), wherein the load supported by the work platform is determined at least partially based on a height-force curve for the lift device, and wherein the linear actuator (26, 326) includes a push tube assembly having a protective outer tube and an inner push tube and the load supported by the work platform is further determined based on a monitored compression of the inner push tube. providing the lift device including the work platform and a linear actuator (26, 326) configured to support and selectively move the work platform between a raised and a lowered position, the linear actuator (26, 326) having an electric motor and an electromagnetic brake; disengaging the electromagnetic brake of the linear actuator (26, 326); maintaining a height of the work platform using the electric motor of the linear actuator (26, 326); determining a motor torque applied by the electric motor; determining an actuator force applied by the linear actuator (26, 326) to the work platform based on the motor torque applied by the electric motor; determining the height of the work platform; and determining the load supported by the work platform based on the actuator force applied to the work platform and the height of the work platform, wherein the motor torque is determined based on at least one of a measured motor current of the electric motor, a measured motor slip of the electric motor, a motor type of the electric motor, a winding density of a coil of the electric motor, and a winding material of the coil of the electric motor, wherein the lift device is a scissor lift having a foldable series of linked support members (25, 325) and the height of the work platform is determined based on a lift angle of at least one linked support member (25, 325), wherein the load supported by the work platform is determined at least partially based on a height-force curve for the lift device, and wherein the linear actuator (26, 326) includes a push tube assembly having a protective outer tube and an inner push tube and the load supported by the work platform is further determined based on a monitored compression of the inner push tube.