Good querry. Calculate the volume of built masses of different materials and multply by standard weight for each separately. You will get the total Weight og the building and that is the load when you devide the area of the surfaces of the masses touching the ground.

You will have to devide the total weight of the building by the area of the ground touched by the building. thus you will get load of the building er unit area on the soil. Foundations merely distribute the load on a wider area suitable to the strength of the soil..

LESSONS DOWN LOAD

1. Process ---- that explains how a structure contains channels and deflects the charges resulting from internal and external forces to the foundations, loads begin on the cover and each load becomes force acting on the lower limbs. also called lowering loads, load flow, downward circulation of charges, transmission charges, etc..

2. ---- The aim of this process is to establish a value of charges on the ground that allows us to calculate the dimensions of the foundation for each leg. Although also based on this procedure we can design what is, beams, columns and walls.

3. ---- The detailed design of structures includes the determination of the shape and size of the members and their connections and the main requirement is that structures should safely support all loads applied to them. Perform lowering of loads is an important step in the design process.

4. --- The lowering of loads is analyzed in detail any project (house, building, bridge, etc.) from the materials with which to build volumetric weight, load types, dimensions of structural elements to the ground and determining the appropriate foundation with the aid of a geotechnical study.

5. - It is very important to determine the weight of the elements of a construction system (low loads), since this is the initial step in the estimation of the burden that these systems produce.

6. - Before lowering of loads is important to analyze the entire project, to see how its elements are integrated.

STEPS TO DOWN LOAD

A. - Identify the slabs. In the case of a system of reinforced concrete slab floors, identifies two types of slabs, PERIMETER, when the relationship between short and long course is not greater than 1.5 (ie divide between the short-length, not is greater than 1.5m). The slab perimeter weight download all four sides. The other slab is called IN ONE SENSE, when the ratio of light gives more than 1.5. It means that the charges fall by the two long sides of the losa.2. - Cargas.Esto analysis is to determine the weight to be distributed by the slab per square meter. Is the sum of the weight of the material on erection, as well as finishes (tiles, mixed layer, etc). Addition must be added the "Live loads" that agree to use that space, the Building Code of the City define.3 it. - Obtaining tax areas. These are the area in square meters will receive the load in the analysis of loads, same as "lower" Through the foundation of the girders and columns or walls. STAY on a slab, the load receives short span an area equal to that of an equilateral triangle that trace, using as the clear short-and from each vertex, trace lines at 45 degrees. The resulting surface of the triangle is the area tributary to the short course. For the long course, and you drew your lines to 45 degrees, obtaining short triangles on both sides, just join the upper vertices of each triangle, thus obtaining two trapezoids. The area of ​​these trapezoids is the lowest taxed in the Side or a slab largo.En IN ONE SENSE, just the area is divided equally between the two clear lengths. Short gaps are considered to drop or not taxed any carga.Desde then the above applies to perfectly rectangular slabs when slabs are not rectangular, the triangles or trapezoids are obtained by plotting to divide each vertex angles of losas.4. - lowering of loads. Here you simply multiply the tax area on each side of the slab, the load per square meter obtained in the analysis of areas and leave you multiply the divide between the length of the section analyzed, thus obtaining the total load received by each girder or beam that defines the slabs. To lower these loads to the foundation, simply apportion between the number of columns that support to such lock, or the wall that supports it. In the case of low load wall directly to the foundation as evenly distributed along the length of muro.Cabe clarify that prefabricated roofing systems, such as joist and Cove or losacero, all without exception slabs are considered IN ONE WAY, loads down the long side.