At installation of ladders the builders face obstacle in the form of lack of the place. In these cases arrange special wheeling steps. That independently to build them, it is necessary to know some subtleties.
Instruction
1. Wheeling steps give the chance to considerably keep space volume. So, if for the-shaped ladder it is necessary to allocate at least 150 cm of length of site, then for zabezhny — only 90 cm. In small rooms such ladders are the unique decision.
2. Begin design of wheeling steps with calculation of width of steps in that place where the leg of the person will go. Normally it is the middle of march therefore do step width in this place not less than 22 cm.
3. Often wheeling steps do, combining with direct stair flights. It allows to reduce length of intermediate interstair landing. Therefore for a start count and execute direct march, and then you pass to wheeling steps.
4. Make them in the form of frame structures. Make three rigid frames of bar, height of tread has to be 17.8 cm. Make width through the movement to the equal width of direct steps. From above fix furniture board — step. After that establish these steps at each other.
5. To avoid expenses on arrangement of ladder, on turn make curve of walls. It you reduce length and width of steps. Consider that anyway, the narrow end of tread of such ladder has to be not less than 10 cm.
6. To smooth a little inconveniences of wheeling steps, allow their device only on condition of horizontal distances between parallel marches at least of ¼ their width, Resort also to calculation of width of steps in the graphic way which is based on proportional broadening of the ends of such steps at the expense of width of straight lines.
7. Draw line which is called bisecting line of the movement on march width. Apply on it width of treads, at the same time begin with curve top. Distribute steps so that the vertical line separated in half on width average step. The more direct steps it will be involved when calculating, the transition from direct steps to zabezhny will be more imperceptible and the ladder will be more convenient.