here you can additionally

(auto-translation from Russian)

The profile of the posts is selected depending on the width of the canopy (from the truss side, below in the sketch for the size " B")

For the width of the canopy:

up to 4000 mm column profile 60x60x2, 5

over 4000 mm to 6000 mm column profile 80x80x3

over 6000 mm to 8000 mm profile 100x100x3

over 8000 mm to 10000 mm profile 120x120x4

Determining the strength of the crossbar:

posts

farm

crossbar

detail of the "noodles"

the calculator will show a positive number as a percentage of the safety margin if the profile is selected correctly and a negative safety margin for the profile that cannot be used.

safety margin of the crossbar

the pipe profile

the dimension "A" (in millimeters)

the dimension "В" (in millimeters)

snow load kgf / m2, for example, in the Moscow region 210

Determination of the "noodle" part for strength:

the "noodles" part of the rectangular section is taken into account in the "flat" position, not " on the edge"

distance between farms or step in millimeters

distance between parts "noodles" or step in millimeters

the pipe profile

safety margin of the "noodles" part

detail of the "noodles"

farm

crossbar

posts

snow load kgf / m2, for example, in the Moscow region 210

flat position

location on an edge

Determination of a complex shape for strength:

The weakest point of the firm is its middle, farms break in the middle when the canopy does not withstand the snow load, so the calculator will show the strength limit of the farm on the break in the middle of the farm. laboe place

The "A" size for any shape you want, triangular, square, etc., is taken in the middle of the total length of the truss between the upper and lower pipe, see examples

Note: this section has already taken into account the safety factor (1.3), that is, for example, the calculator showed a safety factor of 0%, which means that the farm is calculated normally, with a safety factor (1.3)..

the main profile of the company

detail of the "noodles"

farm

crossbar

posts

safety margin of the farm

snow load kgf / m2, for example, in the Moscow region 210

"A" - the dimension between the pipe (in millimeters)

"B" - the distance along the axes of the pillars or the length of the truss (in millimeters)

the distance between the trusses, the step of farms (in millimeters)

Calculation of rafters for strength:

The canopy truss can be made of a single link - a proftrube or an I-beam. The loads on this link are enormous from the fallen snow. Checking the snow load is mandatory here!

We will consider the I-beam only in the position "as a rail to the ground" its dimensions according to GOST 26020-83 (I-beam #10-its height is 100mm, # 14-its height is 140, etc.), and we will consider professional pipes as "flat" and " on the edge"

The angle of inclination is ignored, you can manually add a percentage of the angle of inclination, or leave it as it is, since it only affects the increase in strength.

the main profile of the company

snow load kgf / m2, for example, in the Moscow region 210

safety margin of the rafters

"B"- the distance along the axes of the pillars or the length of the rafters

the distance between the rafters, the pitch of the rafters (in millimeters)

flat position

location on an edge

Determination of system strength

Rigel + under Rigel farm

t often happens that the distance between the posts must be increased, and the crossbar, no matter how powerful it is laid, does not pass the calculation of the snow load. This task is solved by installing an additional subrigel truss, and the pipes of the subrigel truss can be made of a much smaller cross section of the profile. There is a problem-what profile parameter and what should be the width of the podrigelny truss to meet the sufficient strength without overpayments without creating unnecessary heaps in the canopy. Of course, we are talking about a podrigel farm filled with triangular shapes, as shown in the figure, and not squares. The calculator will show the strength of the system, folding resistance to bending of the main bolts plus the resistance of the bottom tube podrigalo farm before the onset of yield strength in tension and not resistance podrigalo farm on a bend when it is incorrectly filled square shapes, with the result that a farm becomes useless.

Rigel farm

Rigel profile

Main profile podrigalo farm

Note: this section already takes into account the safety factor (1.3), that is, for example, the calculator showed a safety factor of 0%, which means that the farm is calculated normally, with a safety factor (1.3)..

"A" - length podrigalo farm

"B" - distance along the axes of the pillars, the width of the canopy (in millimeters)

"C"- the size between the horizontal pipes of the pruning truss (in millimeters)

snow load kgf / m2, for example, in the Moscow region 210

safety margin of the crossbar system + under the crossbar truss

Dear readers! I will be grateful if you leave feedback about this calculator, below is the email address, and I will also be happy to have any suggestions for improving the work of this calculator. I don't know the English language. The calculator is generated from Russian using an online translator, and we would also like to know whether you visit this page as an English reader and whether it was useful to you.