So, you can make a concrete beam, but its use is advisable only if the coverage area is more than 250 meters of square. For small buildings, metal pins are more suitable. Next, rafters are installed, on which the crate will be mounted. For this, a trimming board is perfect. If the area of the object is large enough, then it is better to use the beam for the construction of the frame. After the frame is prepared, you can proceed to the installation of the roofing.















