The frame structure includes the following parts:
Posted: Thu Feb 06, 2025 5:30 am
The first thing to do is to decide on the frame scheme. Rafters can be of the layered or hanging type. The layered ones rest on the walls of the building. They are mounted in structures where the distance between the walls is less than 6.5 m. Hanging rafters are placed on fillies and a wall plate. If the span width is large, the rafter system will need to be reinforced with auxiliary ties.
The main condition for comfortable construction of the attic is the ceiling level - it should be higher than 2.5 m. To ensure such a height, the break line should be located at a height of more than 2.8 m, taking into account the thickness of the material layer for insulation and cladding of the structure. It is also important to consider the colombia mobile database of the floor.
An example of the drawing can be seen in the image:
The minimum ceiling height of a mansard roof is 2.5 m
To calculate the expected snow loads, you will need to use this formula: S = Sg x µ, where S is the snow load, Sg is the weight of the snow cover per 1 m2 of area, µ is a value that depends on the roof slope (1.0 for a flat structure with a slope of 25°, 0.7 for a structure with a slope of 25–60°).
To calculate the wind load, you need to use this formula: W = Wo xk, where Wo is the wind load standard, k is the value that determines the wind load fluctuation based on the height of the building and the type of terrain.
The parameters Sg and Wo can be found in the relevant SNiP, in the section "Rafter systems". If the roof has a steep slope, the snow load can be ignored.
Roof structure
The main condition for comfortable construction of the attic is the ceiling level - it should be higher than 2.5 m. To ensure such a height, the break line should be located at a height of more than 2.8 m, taking into account the thickness of the material layer for insulation and cladding of the structure. It is also important to consider the colombia mobile database of the floor.
An example of the drawing can be seen in the image:
The minimum ceiling height of a mansard roof is 2.5 m
To calculate the expected snow loads, you will need to use this formula: S = Sg x µ, where S is the snow load, Sg is the weight of the snow cover per 1 m2 of area, µ is a value that depends on the roof slope (1.0 for a flat structure with a slope of 25°, 0.7 for a structure with a slope of 25–60°).
To calculate the wind load, you need to use this formula: W = Wo xk, where Wo is the wind load standard, k is the value that determines the wind load fluctuation based on the height of the building and the type of terrain.
The parameters Sg and Wo can be found in the relevant SNiP, in the section "Rafter systems". If the roof has a steep slope, the snow load can be ignored.
Roof structure