Roofing crutch - types, sizes, gost
To create a strong, reliable and durable roof will require not only high-quality waterproofing coating, but also a lot of auxiliary elements. If we are talking about a roof made of galvanized sheet steel, then we should not forget about the special fasteners, which allows fixing the picture firmly on the crate. In this article we will tell what a crutch is a roofing, what it looks like, and what it is used for in the production of roofing work.
Device and purpose
Metal roof crutch is a specific fastening element that is used to increase the rigidity of the eaves overhang of galvanized steel. It is made of corrosion-resistant metal and most often has the following form:
- T-shaped. Auxiliary fasteners for t-shaped eaves are considered the most durable and reliable, so they are used most often.
- L-shaped. The supporting element g-shaped gives less rigidity of the cornice, therefore, withstand less load.
- Bent or double-sided. A rarer kind of auxiliary fasteners of a specific shape, used less frequently.
Note! The t-shaped crutch is considered the optimal choice for mounting galvanized steel roofs, as they give the eaves greater rigidity and also withstand the intense loads that occur during active melting of snow or heavy rains.
Dimensions
The dimensions of the C-crutch for the folded roof are regulated by GOST, they are unified and are presented in 3 versions: 20x4 cm, 25x4 cm, 4x4 cm. However, if necessary, this important fastener can be made by hand on individual sizes. This will require high carbon or galvanized steel, metal shears, welding machine. The manufacture of this part is performed as follows:
- A sheet of metal is cut into strips of the required width. From these bands cut long and short sides of the T-shaped crutch.
- The long and short strips are welded together with a welding machine to form the letter T.
- In the long side of the letter T, 3 holes are made, the diameter of which corresponds to the size of fasteners used for mounting the roof.
- The finished product is coated with an anti-corrosion primer, and then, if desired, coated with powder paint.
Important! Of the three holes, which are made in the roof of the crutch, only two are fastening, and 3 - spare, used, if some kind of core falls on the lumen in the crate.
Mounting technology
Crutches roofing L-shaped and T-shaped are used to increase the rigidity of the eaves of the roof. The roof is constantly subjected to intense loads, and its overhangs in particular, because of which the sheet metal can be deformed. To avoid this problem, crutches are used:
- T-shaped elementс помощью оцинкованных гвоздей в 2 местах фиксируется на обрешетке так, чтобы его короткая сторона на 3-5 см выходила за пределы ската.
- Then these auxiliary structural elements are installed along the entire slope at a distance of 50-70 cm.
- After completion of their installation proceed to the coating of the roof sheet metal.
Remember that auxiliary crutches perform a supporting function, increasing the rigidity of the roof eaves, preventing its deformation under the weight of snow or water.
