what is a Laser concrete screed?

These high-tech screeds are ideal for striking off commercial and industrial concrete floors that must meet stringent F-number tolerances (see Understanding F-Number Requirements for Commercial and Industrial Floors). The screed head comes in various widths, ranging from 12 to 20 feet, and is mounted on a self-propelled four-wheel drive machine with a telescoping boom that extends up to 20 feet across the slab. The screed head is equipped with a plow, auger and vibrator to disperse the fresh concrete, remove excess material to finished grade, and smooth the surface. Laser receivers mounted at each end of the screed head receive a signal from a transmitter to automatically strike off the floor to specified flatness levels. Top manufacturers of laser screeds include Somero Enterprises, Ligchine International and Allen Engineering

.