The roof is one of the main elements of the roof, which takes on all the impacts coming from the atmosphere.
The main function is to drain water and disperse the load on the top of the building after snow falls.
High-quality roofing is valued for long-term operation and a pleasant appearance.
Roof calculation online (calculator with drawings) - will help you make a reliable calculation of the amount of roofing, rafters and battens.
In construction, there are several types of coatings, which in turn are further divided into subspecies. The most common building surfaces are flat(sometimes operated and non-operated) and attic(this includes a whole group of roofs:, conical and others). Without a doubt, when it comes to choosing the type of roof, a further definition of the surface material becomes relevant.
The most popular types include:
- , aluminum seam and other metal roofs;
- slate coating;
- roof made from natural materials.
Roofing materials
As part of the truss system includes many construction "spare parts", but the main ones in this wide list are:
- slopes (inclined planes),
- crate,
- rafters,
- mauerlat bar.
In addition, a gutter, aerator, drainage pipe and others take a certain role in the process of shelter and further functioning of the shelter.
The truss system is represented as a carrier system, which is based on inclined rafter legs, vertical racks, as well as inclined struts. In some cases, it becomes necessary to use rafter beams, which will “tie” the rafter legs. There are hanging and layered rafters. In the first group, trusses with sleepers are separately distinguished.
Roof device
The next layer in the design of the mansard roof is the crate, which is laid over the legs of the truss system. Thus, a certain foundation for the roofing deck appears, and the spatial component of the eaves also expands significantly. Most often, this element is made of either wood or metal.
Mauerlat also adheres to its niche of responsibility. It acts as a support for the rafters along the edges., and lay it on the outer wall around the perimeter. The beam is usually lumber (tobish made of wood), but it is quite reasonable if, in the case of a special metal frame, similar contents will be used to prepare the Mauerlat.
Roof calculation online calculator
How to calculate the roof of a house and how to calculate the material for the roof quickly and without errors? In this one, you can use a specially designed service - a construction calculator for calculating the roof of a private house. The calculator calculates the amount, weight, and more.
Calculator field designations
Specify roofing material:
Select a material from the list -- Slate (corrugated asbestos-cement sheets): Medium profile (11 kg/m2) Slate (corrugated asbestos-cement sheets): Reinforced profile (13 kg/m2) Corrugated cellulose-bitumen sheets (6 kg/m2) Bituminous (soft , flexible) tiles (15 kg/m2) Galvanized sheet metal (6.5 kg/m2) Sheet steel (8 kg/m2) Ceramic tiles (50 kg/m2) Cement-sand tiles (70 kg/m2) Metal tiles, corrugated board (5 kg/m2) Keramoplast (5.5 kg/m2) Seam roof (6 kg/m2) Polymer-sand tiles (25 kg/m2) Ondulin (Euro slate) (4 kg/m2) Composite tiles (7 kg/m2) ) Natural slate (40 kg/m2) Specify the weight of 1 square meter of coating (? kg/m2)
kg/m2
Enter the roof parameters (photo above):
Base Width A (cm)
Base length D (cm)
Lift height B (cm)
Length of side overhangs C (cm)
Front and rear overhang length E (cm)
Rafter:
Rafter pitch (cm)
Type of wood for rafters (cm)
Working section of the side rafter (optional) (cm)
Lathing calculation:
Purlin board width (cm)
Lathing board thickness (cm)
Distance between decking boards
F(cm)
Snow load calculation (pictured below):
Choose your region
1 (80/56 kg/m2) 2 (120/84 kg/m2) 3 (180/126 kg/m2) 4 (240/168 kg/m2) 5 (320/224 kg/m2) 6 (400/280 kg/m2) 7 (480/336 kg/m2) 8 (560/392 kg/m2)
Wind load calculation:
Ia I II III IV V VI VII
Height to building ridge
5 m from 5 m to 10 m from 10 m
Terrain type
Open area Closed area Urban areas
Calculation results
Roof pitch: 0 degrees.
The angle of inclination is suitable for this material.
The angle of inclination for this material is desirable to increase!
It is desirable to reduce the angle of inclination for this material!
Roof surface area: 0 m2.
Approximate weight of roofing material: 0 kg.
Number of rolls of insulation material with 10% overlap (1x15 m): 0 rolls.
Rafter:
Load on the truss system: 0 kg/m2.
Rafter Length: 0 cm
Number of rafters: 0 pcs
Lathing:
Number of rows of lathing (for the entire roof): 0 rows.
Uniform distance between the boards of the crate: 0 cm
The number of boards of the crate with a standard length of 6 meters: 0 pcs
Volume of boards of an obreshetka: 0 m 3 .
Approximate weight of the boards of the crate: 0 kg.
Snow load region
Explanation of calculator fields
Loads acting on the roof
It is likely that when it comes to choosing the type of roof and roofing, one should be guided by more than just visual requirements. First of all, it is necessary to pay attention to studying the issue of the load on the hip.
NOTE!
The roof is affected not only by precipitation and their volumes- temperature instability and various causes of physical and mechanical origin also exert serious pressure on the surface.
There are many reasons and sources of influence, but the leading ones are snow and wind. What can we say, if building codes require mandatory calculations for a future canopy. The calculation has a pronounced individuality in view of the differences in the volume of snow cover that falls in a particular region.
The wind load is not as harmless as it might seem at first glance. In some cases, we have to talk about the load due to the weight of one of the elements of the hip. Most often, the crate or roof acts as a weighting agent.
The topical issue of load is faced by those who is going to use the attic space all year round. In this case, large-scale insulation is necessary (slopes, side walls, etc.), which leads to a significant increase in the pressure force on the surface of the walls. When the attic is not planned to be transferred to a living space, then only one floor needs to be insulated.
The load-bearing structure of the eaves can also exert a noticeable load due to its own weight. In this situation, the load indicators are determined taking into account the average density of materials and the design values of the parameters of a constructive and geometric nature.
All of the above factors of influence are not so easy to analyze, but fortunately, all the necessary SNiPs have long been developed, the norms of which can be consulted at any time.
Cover area calculation
Inevitable in any canopy design. If a the surface of the house will be displayed in a shed plane, then you are very lucky with the calculations.
In such conditions, measure the length and width of the structure, add up the indicators of conditional overhangs and then multiply the two results one by the other.
When it comes to the roof, then several more positions should be used in the calculation, including the angle of inclination of one or another element. First of all, we recommend dividing all capacious parts of the coating into certain parts (for example, into triangles).
In the case of a gable surface, the area of each inclination should be multiplied individually by the cosine of the oblique angle. The slope angle is a figure taken from the intersection of the slope and the floor. As for measuring the length of one inclined, the mentioned parameter should be fixed at the available distance from the ridge to the edge of the eaves.
Roof area calculation
Therefore, the solution algorithm in all projects that use pitched eaves is similar. Upon completion of the marked actions, in order to find out the area of \u200b\u200bthe house dome, you will need to sum up the results obtained.
At construction warehouses and in related stores, slopes with the shape of an irregular polygon can be sold. In this case, remember the advice that has already sounded in the material - divide the plane into identical geometric shapes and, after completing the calculations, simply add them together.
Calculation of the amount of materials for the roof on the example of metal tiles
The metal tile should begin to be considered from the angle of inclination, which was already mentioned in the previous paragraph. If we talk about extremes, then there are all theoretical grounds for saying about 11-70 degree interval. That's just practice, as you know, makes its own adjustments and they do not always coincide with theory.
Experts claim that 45 degrees is the optimal angle of inclination.
Especially when it comes to the roof of the house, which is located in an area with minimal rainfall, which does not require significant slopes. If snow is a fairly frequent visitor, then 45 degrees will be the best option, but because of the increase in wind pressure, it will be necessary to strengthen the crate and truss system. In addition, the greater the slope, the more material will go to the eaves.
Consider the calculation algorithm using the example of a gable roof:
- Let the oblique angle be expressed by the letter A, and ½ of the covered span - B, the height will be H.
- We introduce an action to find the tangent, which is solved by dividing H by B. We know the mentioned values, therefore, using the Bradis table, we find the value of the angle of inclination A through the arc tangent (H / B).
- It is better to use a calculator that can calculate inverse trigonometric functions to solve such serious actions. Then, multiplying B by the length of the cover, we find the area of \u200b\u200beach inclination.
Regarding material costs, such calculations are already addressed at the final design stage. First you need to calculate the surface area that will be laid and directly the dimensions of the roofing material. Let's take a metal tile as an example.
roof area
So, the parameter of the real width is 1180 mm, the effective one is 1100 mm. Now we turn to calculating the length of the coverage of the house, which we have already talked about. Since we are analyzing a fictitious calculation as an example, let the mentioned indicator be equal to 6 meters.
We divide this number by the effective width and get 5.45. The decision of the action displays the number of sheets needed, and since the number is not an integer, for obvious reasons, we round it up.
Thus, we need 6 sheets of metal tiles for flooring one row along the length of the eaves. We proceed to the calculation of the number of sheets vertically.
To measure the vertical row, the size of the overlap should be taken into account (usually taken as 140-150 mm), the distance between the ridge and the cornice, as well as the length of the cornice overhang.
Let the distance be 4 meters, and the overhang - 30 cm. Having made a simple addition, we get a size of 4.3 meters. Let's take the conditional length of a metal tile sheet as 1 meter. Taking into account the overlap, the effective length of one roofing unit will be 0.85 m.
After that, we divide the result of 4.3 m by the effective length and at the end we get 5.05 sheets. In such a small deviation from a whole number, we advise you to round down.
Calculation of steam and waterproofing
- and it is considered very simple. To do this, you just need to divide the covered area by the same parameter of the roofing deck. For example, we are talking about a gable canopy.
Conventionally, we take a slope length of 5 meters and a width of 4 m. Therefore, the area of \u200b\u200bone unit is 20 square meters. m, and the total figure for two slopes will be 40 square meters. m. Steam and waterproofing material is considered to be in rolls.
Useful video
Video instruction for calculating the roof:
In contact with
Loading...