Load bearing construction element, in particular for manufacturing building floors, and floor structure incorporating such element

Composite construction element for manufacturing building floors comprising:

• an elongated body made of expanded plastic material, provided with at least one longitudinal channel open on an upper side for receiving a concrete casting;
• a reinforcement metal structure of the casting to be housed in said at least one longitudinal channel;
• wherein the reinforcement metal structure is provided with:
• a plurality of engagement elements at least in part rigidly incorporated within said elongated body at the time of its manufacturing and at least partially extending in said at least one longitudinal channel, and
• a separate trestle provided with hooking means adapted to engage with said engagement elements for rigidly associating with one another said trestle and said elongated body, after manufacturing of the same and prior to pouring of the casting into said at least one longitudinal channel,
• wherein said trestle has opposite free ends protruding from longitudinally opposite sides of said longitudinal channel.