Puntal for work.; The strut comprises a quick-release arrangement between the lower supporting portion on the floor and the upper bearing portion of the load, consisting of a carrier part recesses staggered as castellated on their upper edge and another support part of susceptible stops to rest on the bottom of said stepped grooves or the upper steps thereof, wherein the recesses staggered are made in the upper edge of the nut height adjuster strut and the abutments capable of resting in the bottom of the grooves or the upper steps thereof are made of a rotating part that receives the load of the upper section of the strut and which also receives the action of an internal spring.
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