This concrete pump is equipped with a placing boom which can be continuously lengthened during pumping. Despite its mini fold-out height of 5,7 m, the S 31 HT telescopes out into the 31 m class due to its remarkable telescope of 4,6 m. This unique feature increases the horizontal working range in the 360 deg. all-round circle by 50 % and the all-round vertical bubble by even 73 %.