Correctly to calculate base width, it is necessary to know thickness of load bearing walls and expected weight load of foundation of the house including communications, finishing and roofing materials and weight of residents.
Instruction
1. Such parameter as width, is present only at continuous footing. Width of the tape on which build house walls means. To look for this indicator the pile, plate or column base has no sense as such pokzatel for them is not defining.
2. What has to be tape width for houses of small weight? Carry frame, panel board buildings and houses from foam to such constructions and gas concrete. For them most often build continuous footing which can be both monolithic, and to the national teams. Width of tape is directly connected not only with rated indicator of the area of sole of the basis, but also with thickness of the bearing and not load bearing walls and also with concrete reinforcing parameters.
3. Precisely to calculate tape width for specific conditions (site relief, soil type and so forth), it is required to conduct very expensive research which is ordered in the firms specializing in such works. If there is no such opportunity, when determining width of the base it is necessary to be guided by the rule developed by professionals in the field of low construction: the tape has to be not less, than thickness of load bearing walls are 10 cm wider.
4. On average, this indicator for frame and panel board houses seldom exceeds 30 cm. Means, continuous footing for such house has to be not less than 40 cm wide. Buildings from foam concrete block can have thickness of walls much more as this material has good heat conductivity and comfortable stay in the house is required or to increase the number of blocks in horizontal row, or to make high-quality warming. In other words, foam concrete block badly holds heat. Therefore width of the base for such houses pays off proceeding from the optimum thickness of load bearing walls.
5. What has to be tape width for houses with big weight? For brick and concrete constructions include the margin of safety of the base which is expressed in its additional strengthening by means of bars of armature 3 m long and with a section of 12-14 mm in this indicator. These rods connect among themselves and stack in horizontal beams along tape perimeter with its external and inside. This strengthening base armopoyas by means of welding fastens to upper part of armoring lattice which is established in timbering before concreting of the base. For the rest width of tape has to correspond to the rule: to be more than thickness of load bearing walls not less, than on 10 cm.