In cases where the distance between the ceiling beams is too large, fix the two layers of beams, perpendicular to each other. This, however, will not be necessary if the finish is wide thick boards.
The methods of fixing the lag to the base depend on its type. The traditional method of fixing a log on concrete or reinforced concrete beams using long nails is already outdated. Yes, and he did not provide a long use lag.
Most often, builders use U-shaped fasteners or corner of galvanized steel. On one side, the corner is fixed to the concrete base with dowels, and on the other side it is screwed to the timber with screws. The fastener enters the lag by 3-5 cm. Similarly, the bars are attached to the brick posts on a dirt base.
If the length of the beam is not enough to cross the entire premises, often, prefabricated structures are used. (more…)