How to fasten a beam for laying a floorboard to a metal profile pipe?

Good afternoon. I need to lay the floor in the hallway with an area of 1.6 x 2.6 meters, the door from which leads to the street. Along the long walls of this room at a distance of 1.11 meters from each other are two channels. I plan to weld a profile pipe of rectangular cross-section on them, and fix the bars on it for laying the floorboard on it. Tell me the best option for attaching the bar to a metal profile pipe.

Combined load-bearing structures, combining metal and wood in different versions, have recently been widely used in the construction of frame houses, fences and gates, installation of roof truss systems, expansion and insulation of balconies and loggias. Depending on the expected load on the structure, one of two ways of attaching wood to metal is chosen

reinforced perforated corners welded to metal;
connection of two materials with special screws.

Reinforced perforated connecting corners are usually used in the installation of roof trusses to enhance the rigidity of the roof, when instead of wooden beams more than 10 m long, powerful channels are installed in the role of rafters, skate supports and girders.

Wooden bars to the crate from a metal profile pipe are fixed with self-tapping screws, and any floor covering can be laid on top of them

For lighter load-bearing structures, which include the floor system planned by you in the hallway, the best option for fastening a wooden beam to a metal profile is self-tapping screws of the appropriate length. At the same time, the wall thickness of the profile pipe should be at least 2 mm so that the applied thread does not loose over time.

In practice, any supporting structure where wood and metal work in pairs has a significant drawback - this is the susceptibility of the hygroscopic tree to rot and the tendency of the metal to corrode upon contact with moisture. Therefore, for fixing these two materials, be sure to use not black, but special galvanized roofing screws.

For fastening wood and metal in combined load-bearing structures, it is recommended to use galvanized roofing screws that are not susceptible to corrosion

Before installation, be sure to treat all wooden elements with antiseptic and water-repellent compounds, and it is advisable to paint metal surfaces.

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