Hip roof roofing calculator online. Calculator for calculating a hip roof. Calculator for calculating the distributed load on rafter legs

The design of the hip roof is unusual. Today it is often used in private housing construction. And the reason is not only in form. You can easily place a room under the roof, saving a lot on the construction of a new living space. The main thing is to carry out thermal insulation measures correctly. But it is necessary to point out that a roof of this type is not an easy structure. Therefore, it is important to accurately calculate hip roof, considering a large number of various nuances. Even small inaccuracies can reduce the reliability of the design.

Roofing device

Hip roofing belongs to the category hipped roofs. Its two opposite slopes are trapezoids, the other two are triangles. They are joined together by so-called corner rafters, which create boundaries between the slopes. These are load-bearing elements of the hip roof, the cross-section of which determines load bearing capacity structures in general.

In addition to the corner rafters in the plan load-bearing structures, there are other elements in the hip roof:

• ridge beam, which is the support for the main number of rafters;
• rafter legs central, they rest on the roof mauerlat with one end, the other on the ridge, are located in the plane of the trapezoidal slope;
• hip rafters, form hip slopes, abut upper ends on the corner rafters.

Pros and cons of a hip roof

Before starting any construction, everyone will want to get acquainted with the features of the structure being constructed.

Experts include the following as the main advantages of a hip roof:

• There are no vertical sides in the design. This feature allows you to more reliably withstand pressure air masses. Therefore, if strong winds prevail in your area, then a hip roof is what you need;
• the design itself rafter system makes the roof quite durable and less susceptible to deformation. But this will be true if the calculation of the hip roof is done correctly;
• the presence of four slopes makes it possible to create overhangs around the entire perimeter of the house, which allows you to more reliably protect the walls from the effects of precipitation;
• has an attractive appearance.

The last circumstance can help significantly if you decide to build attic floor into an already used building. In this case, the hip roof will visually reduce the height of the house, which will improve its aesthetic appearance.

But this design is not without its drawbacks. First of all, as mentioned above, this is a rather complex device. Building such a shelter can only be done if you have certain skills. In addition, a large number of materials increases the cost of building a facility.

Another disadvantage of a hip roof is that the slopes around the entire perimeter of the house will take up a lot of space. free space. This circumstance may prevent construction large room on the attic floor.

Something to remember! A hip roof is a fairly common option. It is often used if you want to have an attic floor or in places with high wind loads. This roofing option is a durable structure that can withstand significant atmospheric influences. But having decided to choose it, you need to prepare for some difficulties. Firstly, a hip roof is quite complex. Secondly, you must be prepared for large expenses. But the most important thing is to make the correct calculation of the hip roof.

Slope angle

This is one of the most important indicators, which is calculated first. It all depends on the type roofing material planned for the project to be covered roofing structure. Because not all roofing materials can withstand the required loads from precipitation without taking into account the angle of inclination of the slope.

Here are some ratios:

• the angle of inclination of the slopes when laying corrugated sheets on them should not be less than 12°;
• – 14°;
• slate – 22°;
• bitumen shingles - 11°;
• ondulina - 6°;
• rolled roofing materials – 3–5°.

Note! The amount of material used to cover the roof depends on the slope of the slopes. The steeper the design, the higher the costs. At the same time, not only the amount of roofing material increases, but also the sheathing elements, the length of the rafters, the amount of insulation and protective polymer films.

Therefore, when calculating a hip roof, it is necessary to determine the amount of building materials used. To do this you will have to calculate the roof area.

Roof slope area

Everything here is quite simple because the shape of the stingrays is geometric figures, whose areas are known.

Area of ​​the trapezoid: S=(a+b)h/2, where “a” is the length of the ridge beam, “b” is the length of the cornice, “h” is the height of the slope, that is, the distance from the ridge to the cornice in a straight line.

Area of ​​the triangle: S=hb/2, where “h” is the height, that is, the distance from the cornice to the end of the ridge, “b” is the length of the hip slope cornice.

By substituting the values ​​of the roof dimensions into the formulas, the actual area of ​​the slopes is determined. And since pitched structures two each, then their values ​​are multiplied by “2”. Then both obtained results are summed up. This will be the total area of ​​the hip roof.

Or simply fill out the fields of the online calculator below, the system will do everything

Using a calculator for calculating a hip roof, you can determine the angle of inclination, the amount of sheathing and calculate the rafter system. You will also be given detailed information on the required volume of building materials. Perform an online calculation of the hip roof of a house.

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) Bitumen (soft , flexible) tiles (15 kg/m2) Galvanized sheet (6.5 kg/m2) Sheet steel (8 kg/m2) Ceramic tiles(50 kg/m2) Cement-sand tiles (70 kg/m2) Metal tiles, corrugated sheets (5 kg/m2) Keramoplast (5.5 kg/m2) Seam roofing (6 kg/m2) Polymer-sand tiles (25 kg/m2) 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/m 2

Enter roof parameters:

Base width A (cm)

Base Length B(cm)

Roof angle α (deg)

Length of side overhangs C (cm)

Length of end overhangs D (cm)

Rafters:

Rafter pitch (cm)

Type of wood for rafters (cm)

Lathing calculation:

Sheathing board width (cm)

Sheathing board thickness (cm)

Distance between sheathing boards
(cm)

Snow load calculation:

Select your region using the map below

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 the ridge of the building

5 m from 5 m to 10 m from 10 m

Terrain type

Open area Closed area Urban areas

Calculation results

The tilt angle is suitable for of this material.

It is advisable to increase the angle of inclination for this material!

It is advisable to reduce the angle of inclination for this material!

Lifting height: 0 cm

Ridge beam length: 0 cm

Roof surface area: 0 m.

Approximate weight of roofing material: 0 kg.

Number of rolls of insulating material with 10% overlap (1×15 m): 0 rolls.

Rafters:

Load on the rafter system: 0 kg/m2.

Side rafter length: 0 cm

Length of diagonal rafters: 0 cm

Quantity hip rafters: 0 pcs.

Reduce the pitch of the rafters!

Number of side rafters: 0 pcs.

Lathing:

Number of rows of sheathing (for the entire roof): 0 rows.

Uniform distance between sheathing boards: 0 cm

Number of sheathing boards standard length 6 meters: 0 pcs.

Volume of sheathing boards: 0 m3.

Approximate weight of sheathing boards: 0 kg.

About the calculator

An online calculator for a hip roof will help you calculate its parameters: the volume of roofing and insulating materials, sheathing, the strength of the rafter system, the correct angle of inclination of the roof slopes. The calculator database contains information about most roofing materials. These are metal tiles, bitumen, ceramic and cement-sand tiles, bitumen and asbestos cement slate, ondulin and other materials. Therefore, by using this calculator you can more accurately calculate the structure and decide on future construction. This calculator considers classic version hip roof with equal slopes and equal slope angles relative to the base of the roof.

Before constructing a hip roof, familiarize yourself with regulatory documents, such as SNiP 2.08.01-89 “RESIDENTIAL BUILDINGS”.

A hip roof is a unique version of a gable roof, but in profile it has the shape of a trapezoid. At the ends of the hip roof there are slopes shaped like triangles (the so-called hips). The roof has a total of 4 slopes (two side and two end) and 4 ribs (so-called diagonal rafters).

This design, although more complex than usual gable roofs, but has its advantages, and the hip roof looks great.

There are also half-hip roofs, in which the hip slopes are shorter and do not reach the eaves.

To finish a hip roof, you can use all kinds of roofing materials. When choosing them, you should take into account the climate of your region and pay attention to the performance characteristics of the materials.

When filling out the fields of the calculator, you can find out Additional information, located under the sign.

If you have any questions or suggestions about this calculator, you can write to us using the comment form at the bottom of the page. We'd love to hear your opinion.

Additional information about the calculation results

Roof angle

Here you will see a message indicating whether the specified roof angle complies with roofing material standards. If the angle does not match, you will be advised to change it.

Lifting height

The height of the roof from its base to the ridge (overhangs are not taken into account).

Ridge beam length

The ridge beam will have a given length between the hips.

Roof surface area

The area of ​​the entire surface, including existing overhangs. This parameter will help you calculate necessary materials for construction.

Approximate weight of roofing material

The total mass of the selected roofing material required for a roof of a given size.

Number of rolls of insulating material

The required amount of insulating material. The quantity indicated in rolls is based on the standard - 15 meters long, 1 meter wide. The calculation also took into account an overlap of 10%.

Load on the rafter system

The maximum weight exerted on the rafter system. Wind and snow loads the selected region, the angle of the roof, as well as the weight of the entire structure.

Side rafter length

Estimated length of rafters taking into account overhangs.

Length of diagonal (sloping) rafters

The length of each of the four diagonal rafters (ribs).

Number of side and hip rafters

The total number of rafters for the side and hip slopes, not counting the four diagonal rafters.

Minimum section of rafters / Weight of rafters / Volume of beams

1. The first column shows the cross-sections of the rafters according to GOST 24454-80 Lumber coniferous species . Here are the sections that can be used when building a hip roof with the given parameters. The starting point for calculations is total load on the design. After which the corresponding section of the rafters is determined, presented in this table.
2. The second column indicates the total weight of the rafters, which would be obtained if they were used to construct the entire roof.
3. The third column indicates the total volume of rafters in cubic meters. This indicator may be useful to you when calculating the cost.

Number of rows of sheathing

The number of rows of sheathing that will be needed for the entire roof with the given parameters. Be sure to check required amount rows of sheathing for the selected roofing material, this can be done from roofing material retailers.

Uniform distance between sheathing boards

To evenly space the sheathing, use the step shown here. It will provide the necessary strength of the roof and save material.

Volume of sheathing boards

Volume of boards per sheathing (for the entire roof). This value will help you when calculating the cost of lumber.

Hip roof- this is a variety attic roof. It is often installed in houses where it is planned to arrange additional residential or non-residential space. Hip roof design hipped. The two side parts – the slopes – have a trapezoidal shape, the two end parts – the hips – are triangular.

Advantages of a hip roof:

• The ability to withstand even strong gusts of wind;
• Rigid construction minimizes roof deformation;
• Aesthetic appearance, the ability to visually make the building more compact;
• Possibility to arrange large side eaves overhangs, providing this additional protection walls of the building from the effects of precipitation.

The disadvantages of hip roofs include the complexity of design and installation, and high cost.

- This is the basis of the roof. Rafters are most often made from coniferous tree processed special composition to prevent rotting and insects from settling in it.

To support the rafters on the hip roof, a mauerlat is installed - a beam, which is also intended to distribute the load on the walls of the building. Central element- the ridge of the hip roof, to which most of the rafters are attached.

There are three types:

• Central (ordinary) - attached to ridge beam at the same distance from each other;
• Diagonal - join with corner rafters;
• Corner - attached to the ridge beam and connected to the diagonal rafters on different heights in order for the structure to gain additional strength.

After installing the rafter system, the sheathing is installed and the insulating materials and coating. At the same time, chimneys, drainage and ventilation systems are being installed.

Rafter hip roof– the design is complex, requiring careful calculations before the installation process. One of important parameters — hip roof angle. It depends on the expected load on the roof, the force of impact external factors eg wind, snow. Roofing materials also affect the angle of the roof. The maximum recommended for slate is 22°, the minimum for multi-layer roll material— 5°. The material that can be used to cover a hip roof at any angle of inclination is membrane roofing.

Accurate preliminary hip roof calculation will avoid extra costs and unpleasant moments during installation. There are several calculation methods, as well as many online calculators for determining hip roof area, hip roof height and other design parameters. But top scores demonstrates the use of special software. In just a few minutes, after entering basic data, the user will receive accurate, reliable calculations, based on which you can safely begin construction. The programs are good because they provide all the parameters for the most objective calculation.

The program will make it easy to get everything you need design parameters for this type of roof. You do not need deep knowledge of how to calculate a hip roof; the algorithm developed by our designers will do this for you. It takes into account all the nuances that may arise during the design and construction of a roof.

The hip roof calculation calculator will allow you to competently plan the process of purchasing and consuming building materials, and resolve all issues related to the reliability of the rafter system and the roof structure as a whole.

Specifics of the program

Our online calculator provides calculations for the hip roof rafter system, which has equal angles between the base of the roof and the side and end slopes. It is proposed to fill certain fields with initial sizes:

• Linear characteristics of the house - length, width, walls;
• Roof parameters - width and length of the base, desired height, length of overhangs;
• Data for calculating hip roof rafters and sheathing - width, thickness, and pitch;
• Options OSB sheet- only for soft type roofs;
• Roofing sheets and information on vapor barriers - overlap size, etc.

Explanations of hip roof calculation results

1. Calculation of the hip roof truss system with a detailed drawing of the entire structure in general (with symbols) and final data:

• Dimensions of all hip roof rafters individually (sloping, diagonal, etc.);
• Calculation of lathing and counter-lattice;
• Calculation of the Mauerlat with a detailed final drawing;
• Calculation of the hip roof area.

The total volume of wood for rafters and sheathing (volume of lumber);

Drawings of all types of rafter legs separately;

Layout of rafters on future roof with a mark for each type;

Drawings of the finished roof truss system from different sides;

Of course, an interactive 3D model of a hip roof for clarity.

The lengths of side and hip rafters in the results and drawings are indicated taking into account overhangs.

Now you don’t need to think about how to calculate the area of ​​a hip roof to purchase the necessary building materials, all necessary information available on our website calculator. Bookmark and share with friends to useful tool was always at hand.

Calculating a hip roof online will save time and money on purchasing the necessary building materials, and get a detailed list of the sizes of the main components and elements for arranging the roof of your home.

A classic roof with its two slopes and end gables rarely suits a modern developer. More often country cottages decorated with a hip roof - spectacular, but more difficult to manufacture.

In our article we will deal in detail with this important issue how to calculate the rafter system of a hip roof. The data obtained will help you spend optimally construction material and will significantly simplify the installation process itself.

What is a hip roof

The hip structure is complex hipped roof shaped like a trapezoid. There are slopes (hips) at the end of the roof; outwardly their shape resembles a triangle. In total, the roof has 4 slopes - 2 side and 2 end, and 4 ribs (they are also called diagonal rafters).

The roof truss structure is based on a complex frame. The central rafters, due to the nature of their structure, create extra load. In addition, the rafters must withstand snow and wind loads(in areas with frequent snowfalls this is doubly true).

The design is labor-intensive during installation, but outwardly looks more advantageous than a conventional one gable roof. To finish this type of roof, you can use any roofing material. When choosing a coating, it is important to consider the features climate zone where construction will take place.

About the calculator

To calculate a hip roof, you can use several methods: manually or using special construction programs(calculators). For manual calculation you will need good knowledge in algebra and geometry. The formula for calculating a hip roof consists of the sum of the areas of 2 triangles (hips) and 2 trapezoidal side slopes. The area of ​​the hip slopes is calculated using the well-known formula of an isosceles triangle. The area of ​​a trapezoid is more complex and is subtracted using the formula presented in the figure below.

The calculator database contains information about the most popular types roofing materials – metal, ceramic, cement-sand, bitumen shingles and other coatings. To get the result, the user must note the required roofing material, the dimensions of the roof base, the length of the overhangs, the planned pitch of the rafters, the type and parameters of wood for the sheathing, and mark the region of construction. Next, the system will provide a complete calculation of the hip roof of the house according to the selected parameters.

Important: the calculator will prepare a report taking into account data from the meteorological service of the development area, the average wind speed and strength, and precipitation intensity will be taken into account.

Calculation results - explanations

The online calculator report includes the following items:

Roof. The calculator, according to the specified conditions, will recommend the angle of inclination of the side and hip rafters. This value directly depends on the selected development area. The calculator will also determine the approximate weight of the roofing material and the required amount of roofing felt (indicated in rolls);

Rafters. The length of the side, diagonal and hip rafters will be given.

Important: the size of the side rafters is calculated taking into account the overhang!

The required number of side and hip rafters required for the entire roof.

Important: in given value does not include diagonal rafters (+4 pcs.)

Lathing. The Hip Roof Calculator will determine how many rows of sheathing are needed for a given roof area and will also determine the number of sheathing boards (each 6m long).

Important: the program takes everything into account important points: length and width of the roof, size gable overhangs and roofing eaves on all sides and the angle of inclination of the hips.