An arrangement for the transfer of layers of pieces of timber from an input transporter to a stacking table that can be raised and lowered in order to form a stack of timber, comprising a number of support planes that are mobile in a cyclical path, each one of which consists of - a number of deposit arms lying next to each other and that are arranged to be brought by a drive mechanism to a common synchronous motion forwards and backwards from the stacking table each along a rail that is arranged such that it can be pivoted around a pivot point, - a lifting mechanism for the raising and lowering of the free ends of said rail and with which lifting mechanism the deposit arms are able to pivot individually around the pivot point and through which motion a collected layer of a number of pieces of timber that has been pre-determined can be lifted and displaced in, over and down onto the stacking table and backwards such that the deposit arms are withdrawn from the stacking table while the layer of timber is being deposited from the support plane to the stacking table, characterised in that each support plane comprises further, - a release arrangement arranged at each deposit arm and comprising a lifting cylinder with an associated piston rod lock, said piston rod lock forming a reset means by which the release arrangement can be driven between a free tensioned condition and a locked transport condition, wherein the lifting cylinder with the piston rod lock is coupled in a manner that transfers motion between the free end of said rail and a free end of said-lifting mechanism, whereby, when reset, into its free tensioned condition the release arrangement allows a deposit arm to "float" along an area of motion, determined in advance, in its direction of lift relative to the lifting mechanism, and to be stopped during its lowering motion when it makes contact with pieces of timber in a previously laid layer on the stacking table at the same time as the lifting mechanism can continue its downwards motion, whereby, when the release arrangement is set into its locked transport condition, the deposit arm is locked in its direction of lowering relative to the lifting mechanism. - a number of deposit arms lying next to each other and that are arranged to be brought by a drive mechanism to a common synchronous motion forwards and backwards from the stacking table each along a rail that is arranged such that it can be pivoted around a pivot point, - a lifting mechanism for the raising and lowering of the free ends of said rail and with which lifting mechanism the deposit arms are able to pivot individually around the pivot point and through which motion a collected layer of a number of pieces of timber that has been pre-determined can be lifted and displaced in, over and down onto the stacking table and backwards such that the deposit arms are withdrawn from the stacking table while the layer of timber is being deposited from the support plane to the stacking table, characterised in that each support plane comprises further, - a release arrangement arranged at each deposit arm and comprising a lifting cylinder with an associated piston rod lock, said piston rod lock forming a reset means by which the release arrangement can be driven between a free tensioned condition and a locked transport condition,