In order to meet the requirements of various building forms, the detail treatment of the aluminum magnesium manganese roof system is
very important. This paper will introduce the methods of wind resistance treatment of the roof system to you:
1、 Special treatment:
1. Special treatment of cornice:
The roof panel is folded down at the cornice of the roof system, the same as above, and the possibility of damage caused by the wind at the cornice is greatly reduced by changing the stress
mode. In addition, a long dripping piece is added under the cornice sealing strip to strengthen the integrity of the central part and increase the overall deflection of the roof panel.
2. Special treatment of ridges and Gables:
Based on the
analysis of the past cases of aluminum magnesium manganese roof system damaged by wind, the early failure of ridge and gable occurred in ridge flashing and gable flashing. These flashings were lifted after the wind load, resulting in local damage, thus
reducing the wind resistance stability of the whole roof system, and the whole roof collapse occurred at the end. In this process, the larger damage caused by wind is the weaker part of the roof system. In view of this situation, the roof flashing and
gable flashing fixed on the supports are generally considered to fold down in the design, so as to effectively increase the wind resistance.
2、 Fixed mode:
As a traditional profiled metal roof, its backward fixing form determines its insufficient resistance to the wind. For example, the roof panel fixed by the screw penetration form has a small contact area between the screw cap and the panel. When
encountering strong wind, because of the repeated positive and negative wind pressure, the roof panel produces stress concentration at the nail hole, which leads to tearing. Although the screw remains on the purlin, the roof panel has been blown away.
The vertical locking type aluminum magnesium manganese roof system is different from the traditional plate construction in the fixed form. The strong aluminum alloy fixed base is fixed with the purlin first, and then the roof panel is clamped on the
plum head of the fixed base, and then the overlapping plate rib is locked on the fixed base with the electric locking machine. This fixed form does not need to penetrate the plate surface, so the roof panel is not damaged arbitrarily, Of course, there
is no problem of stress concentration.
In the repeated loading test of 7.0kpa, the test pieces (including roof panel, fixed seat and screw) were not damaged, which proved the excellent performance of the roof system.