Telescopic support for the construction sector

The invention relates to a telescopic support 10 for the construction sector, with an outer tube 12 and a therein axially slidably disposed inner tube 14, which is secured by means of a fail-safe against removal from the outer tube 12th The failover has a disposed on the outer tube 12 stop element to which at least one is arranged on the inner tube 14 stop means 48 to be brought into contact. According to the invention the stop element is provided in the region of one end 20 of the outer tube 12 and covers the free cross-sectional area of ​​the outer tube 12 at least partly. The stop member is preferably constructed as cap 22 and has an internal thread 26 which engages in an external thread 36 of the outer tube 12th The external thread 36 is connected to a Absenkmutter 38 in engagement, on the one transverse to the longitudinal axis 30 of the telescopic support 10 through the outer and inner tubes 12; 14 feasible safety pin 40 can be supported.