The BT90 modular screed is easily assembled with screed sections made of self-supporting triangular steel frames of 1m, 2m and 3m to which a drive section is added. The BT90 is available in 3 versions : electric, petrol (gas) or pneumatic. Slabs with low slump concrete can be finished flat, parabolic, rooftop or inverted with the screed’s adjusting system (turnbuckle), due to a unique rubber claw device.