Abstract: A tubular structural profile and construction system, produced by cutting and folding a semi-rigid and foldable sheet, having four orthogonal layers joined at fold lines and two internal diagonal layers joining two opposing fold lines. The sheet has six rectangular sections. The cutting lines are positioned for at least one tongue, which coincides with at least one slot located on an opposing fold lines, such that, during the folding, the profile is closed of the coming together of fold lines and both internal diagonal layers, and by means of the insertion of at least one tongue on its corresponding slot, and wherein, in addition, the profile of the formed system can have at least one break in the second external layers and in the two internal diagonal layers, which permit the creation of an engaging area for transverse structural profiles.

Abstract: A tubular structural profile and construction system, produced by cutting and folding a semi-rigid and foldable sheet, having four orthogonal layers joined at fold lines and two internal diagonal layers joining two opposing fold lines. The sheet has six rectangular sections. The cutting lines are positioned for at least one tongue, which coincides with at least one slot located on an opposing fold lines, such that, during the folding, the profile is closed by means of the coming together of fold lines and both internal diagonal layers, and by means of the insertion of at least one tongue on its corresponding slot, and wherein, in addition, the profile of the formed system can have at least one break in the second external layers and in the two internal diagonal layers, which permit the creation of an angaging area for transverse structural profiles.

Abstract: Modular connector for electrical connections, provided with an external anchoring system which facilitates the grouping and fixing of several connectors through male and female couplings, both laterally and transversally. For first-sight recognition, the wraparound insulating carcasses (4) are standard color-keyed to identify the conductors. For the recognition of each circuit it is provided with an upper cover (6) which can be signaled by the user. The conductor part has a set of one or more metallic parts always of the same pole (1), and the set is built into a wraparound insulating carcass (5), having the same color as the conductor cable for this element.

Abstract: A loading arm having dual inboard and outboard arms and dual connections for connecting the arm to a tank in which provision is made for the loading arm to be connected to side-by-side flanges on the tank and to provide for movement of the connecting system in three mutually perpendicular planes relative to the outboard arm of the loading arm.