Construction of a roof truss system

The roof rafter system is actually its skeleton and consists of such basic elements as rafters, mauerlat and girders (beams). Its main purpose is to hold the roof on itself and transfer the load from the weight of the roof, snow, wind and people working on the roof to the load-bearing walls of the building.

It is usually made from dried softwood lumber. The most popular type of wood is pine. Before starting construction or during its process, it is necessary to treat wooden parts with fire and bioprotective preparations.

Rafters are usually made of boards 150* 50 mm. The standard length of lumber is 4 or 6 meters, so if this length is not enough, they are increased by connecting them with overlays on top. If the expected operating load for a single board is high, additional elements are introduced into the structure to increase its bearing capacity - tightens, struts, crossbars, supports, struts, etc., or they are joined together into two boards. It is also possible to use a bar instead of a board. The main components of the rafters are the rafter legs, which connect to each other at the top. There are two types of rafters: hanging and slatted. Hanging rafters are called rafters that rely only on two extreme supports. Slatted rafters are called, which, in addition to the outermost ones, also rely on intermediate supports.

Sometimes sloping or diagonal rafters are also distinguished, which are located from the roof ridge at an angle to the adjacent corners of the outer walls (hip, tent and other types of roofs). Some authors do not distinguish them as a type of rafter, designating them as slanted or diagonal rafter legs in the design of the rafter system.

The rafters

A mauerlate is an element of a rafter system that serves to redistribute the load from the rafter legs over the entire length of the load-bearing walls. It is usually made of 150* 150 or 100*150 mm timber. In small structures, it can be 100*100 mm. It can be located along the entire perimeter of the building or only along the roof slopes. It can be in the form of a solid beam, or in the form of segments of a meter and a half or less. The Mauerlat must be attached to the walls of the building to fix the roof, since the roof, especially steep and high, has a large sail. If the house is made of blocks or bricks, 2-3 layers of roofing material or roofing material are laid under the mauerlat for waterproofing. The upper crown will serve as a mauerlat for a wooden log house.

The individual rafters in the rafter system are interconnected by girders. A ridge or gable girder runs along the ridge under the rafters, with which they are fastened.

Nails, screws, staples, wire rod twists, clamps, perforated corners, plates, tapes, etc. are used as fasteners during construction work. 1xBet regularly runs 50+ promotions for both new and existing Bangladeshi players. Use the 1xbet promo code Bangladesh to claim a 200% casino bonus of up to ৳2,10,000 + 150 free spins, spread across the first four deposits. After verification, make a minimum deposit of ৳1,400, and the bonus will be credited to your account. This qualifying deposit becomes ৳2,000 each for the second, third, and fourth bonuses. To help you decide if the 1xBet welcome bonus is worth claiming, here is a quick table outlining the main benefits and drawbacks of the sports and casino bonuses.