The metal porch has to be not only reliable, but also esthetic therefore it is necessary to take care, first of all, of its durability, and later of exterior. Reliability will provide the base for which it is necessary to equip trench.
The porch at the entrance to the building undergoes heavy mechanical loads as daily it is reused many people. For this reason it has to be reliable. But the porch has to meet not only the requirements of durability, but also esthetics. If to use wood, then it will be not so reliable, and over time will lose at all integrity as the tree is not capable to resist to external influences of the environment long.
The sizes of elements of porch for exterior esthetics
It is more preferable to make porch of metal, for this purpose originally it is necessary to prepare the sketch. It is necessary to consider in the course of drawing up the drawing that such porch does not do without availability of ladder. Its dimensions can vary within 0.8-1.0 m. These sizes are minimum and can be increased if desired.
The ladder should give bias no more than 45 ° and not less than 26 °. The sizes of metal steps on height can be equal to limit of 12-20 cm, and here their width should not be less than 25 cm. The top platform has to have such dimensions that the door had no obstacles when opening. The lower edge of door has to be 5 cm higher than porch surface.
Base for reliability of metal porch
To provide durability of design, it is necessary to lay the foundation. It has to be buried below the line of freezing at 20-30 cm. If the porch is attached to the building which is all the year round heated, is admissible to reduce depth of underlay of the basis of porch. For the base at the first stage it is necessary to equip ditch. Further it is possible to lay sand, having stamped it. Thickness of layer of sand has to be 10 cm. Later it is possible to establish timbering. Filling of timbering has to be preceded by reinforcing, it is necessary to use armature with diameter of 12 mm. When concreting it is necessary to consider that the metal design of ladder has to be a little submerged in cement. It is not necessary to fill in concrete to site top, it is necessary to leave 10-30 cm. Further it is possible to start mounting of metal porch, only later it is admissible to flood concrete site finally. The filled-in concrete has to be stamped, and later is protected by polyethylene.
Work with metal
As basis of metal design it is necessary to use couple of channels, having exposed them on width of stair. To channels it is necessary to strengthen rolling under steps. The Ravnopolochny corner has to be mounted to the 2nd channels, for this purpose it is necessary to cut off rolling to the necessary sizes, considering weld length. Further the corner can be welded on contour. The following corner needs to be strengthened on contour to other corner. Then the corner has to be welded on channel.-Shaped parts have to be connected. The lower part of steps has to be strengthened too by corner which is established by regiments outside. To record steps to metal, it is necessary to use self-tapping screws.