The machine (1) comprises: retaining means (3, 4) of a first profiled element (5) and of a second profiled element (6) made of plastic material, which extend along respective longitudinal directions and are each provided with at least one area to be welded (7) substantially inclined by an angle comprised between 10? and 80? with respect to the respective longitudinal direction and at least one main face (5a, 6a) square-shaped, wherein the main face (5a) of the first profiled element (5) is projected with respect to the respective area to be welded (7) and the main face (6a) of the second profiled element (6) is recessed with respect to the relevant area to be welded (7); removal means (16) comprising a pair of milling tools (17) movable in rotation around a relevant axis of rotation (R); suction means (20) adapted to remove the residues of plastic material generated during the removal of the plastic material;
wherein the suction means (20) comprise at least one suction duct (21) arranged around a respective milling tool (17), which comprises a substantially flat abutment portion (24) adapted to internally abut against the main face (5a) of the first profiled element (5) during the removal of the plastic material.

A tornado shelter and having a reinforced monolithic construction resulting from a single pour of concrete is described herein. Rebar extends upwardly from a base. The rebar is encased in concrete that forms the walls of the shelter. An upper portion of the rebar extend above a top surface of each of the walls. The upper portion of each of said rods are bent inwards and are also encased in the single pour of concrete for strengthening a ceiling portion of the shelter. A door, in-wall conduits, vent orifices and attached benches may also be provided.

A composite profile includes a polymeric core and a side profile configured to be provided on an external surface of the core profile. The composite profile has a longitudinal direction Y, a depth direction X perpendicular to the Y-direction and a height direction Z, perpendicular to the X and Y directions. The polymeric core profile and the side profile include a first set of coupling means for attaching the side profile in a first position on the polymeric core profile and a second set of coupling means for attaching the side profile in a second position on the polymeric core profile. The side profile is repositioned over a distance D in the Z-direction when coupling the side profile and polymeric core profile with the second set of coupling means versus a coupling with the first set of coupling means.

Provided is a resin profile joining method of joining a pair of resin profiles. The method includes: holding one resin profile and another resin profile of the pair of resin profiles with a first mold and a second mold, respectively; heating the end surfaces of the pair of resin profiles in no contact with the end surfaces of the pair of resin profiles to melt the pair of resin profiles; after the heating, moving each of the first mold and the second mold relative to the pair of resin profiles in a longitudinal direction of a corresponding resin profile of the pair of resin profiles; and crimping the end surfaces of the pair of resin profiles to each other while keeping the first mold and the second mold in contact with the surfaces of the pair of resin profiles.

A fixture for a door or window includes a fixed frame and a movable frame. At least one of the fixed frame or the movable frame includes a first metal profile made of aluminum or aluminum alloy, a second metal profile also made of aluminum or aluminum alloy, and at least one laser joint between the first profile and the second profile. A mechanical joint may also be provided between the first profile and the second profile. The mechanical joint including a metal bracket made of aluminum or aluminum alloy.