How to Calculate an Indeterminate Beam? Truss Tutorials What is a Truss? Wind Load Calculator Figure 1. Table NA. Each parameter will be discussed in subsequently.
Figure 4. Figure 5. Table 4. Calculated external pressure coefficient for roof surfaces. Table 5. Calculated external wind pressure each surface. Inner frame to be considered. Figure Was this article helpful to you? Yes No. How can we help? Free Account Today! Try SkyCiv Mobile! SkyCiv Software. Free Resources. SkyCiv Structural 3D Reviews. SkyCiv Engineering. Mean Roof Ht. Check Criteria for a Low-Rise Building: 1. Table External Pressure Coeff's.
For Trans. The Basic Design Wind Speed, V mph , corresponds to a 3-second gust speed at 33' above ground in Exposure Category "C" and is associated with an annual probability of 0.
The eave height, 'he', is the distance from the ground surface adjacent to the building to the roof eave line at a particular wall.
If the height of the eave varies along the wall, the average height shall be used. This program assumes that a Gable roof is symmetrical, as the ridge line is assumed in the center of the building width. The Topographic Factor, Kzt , accounts for effect of wind speed-up over isolated hills and escarpments Sect. This worksheet assumes either Enclosed or Partially Enclosed buildings, and does not consider open buildings. An enclosed building is a building that does not comply with the requirements for open or partially enclosed buildings.
The building mean roof height, h, does not exceed the least horizontal dimension, L or B. Per Code Section 6. Gable Monoslope. ASCE is also included in MecaWind, but this older version of the standard is used less frequently in jurisdictions.
However, having it included allows users to evaluate existing structures to the older version of the ASCE 7 standard. MecaWind software is very cost effective, easy to use, and has a minimal learning curve.
The software allows you to perform wind design with ease and is essentially a wind pressure calculator. MecaWind calculates wind loads per the ASCE 7 standard, and in that standard there are two basic classifications of structures:. A building is just as you would expect, it could be a simple house or storage building or a high rise building. There are many different special classifications of buildings within the ASCE 7 standard, and all of these are covered by the MecaWind wind load calculator software.
Below is a list of examples:. There are several different roof types which are addressed in the ASCE 7 standard, and these same roof types are also included as options with the MecaWind wind load calculator software.
Depending upon the specific analysis methods chosen, some of these roofs are not handled by ASCE 7. However, the MecaWind wind load calculator software makes it easy for the user to easily see which roofs are permissible based upon the method that has been selected by the user. Many different types of buildings have overhangs, and the criteria in ASCE 7 on how to calculate wind pressures is cumbersome, to say the least.
Depending upon whether the overhang has a soffit or not determines when the building internal pressure must be taken into account. Parapets are very common in buildings, and the criteria in ASCE 7 on how to calculate wind pressures on parapets is anything but simple.
Fortunately, MecaWind makes the process of calculating wind loads on parapets relatively simple. Enter the dimensions and porosity of the parapet, and then the wind pressure calculator will clearly display the results on all surfaces in the analysis output. The system generally receives wind loads from multiple surfaces. For designers that are designing the MWFRS, you will need the wind pressures on all the surfaces of the building in order to get the overall load on the structural elements.
Can you use any of these four methods? The answer is no, you must meet the criteria specified for each method in order to use that procedure. The circles next to each method are either Red Not valid or Green Valid giving the user a quick overview of which methods can be used based on the structure parameters entered.
Clicking on these circles then gives the color coded summary of what criteria has been met. Any method that is Green can be selected, and the designer can easily compare the pressures and loads between the different methods. This process is shown graphically below, or by viewing this video on our youtube channel.
For example, this would consist of windows, doors, roof decking, fasteners, etc.. ASCE 7 offers several methods to use for the wind pressure calculator on components and cladding. This broad category includes many different types of structures and equipment. The program is simple to use, and offers a professional looking output with all necessary wind design calculations. The user also has a great deal of control at their fingertips to customize their output to suit their needs. See the table below for a detailed summary for what is included in the Standard version.
Seeing the pressures graphically gives the user a real advantage at being able to visualize what is physically occurring to their structure. Here is an example of the one page summary that you can create.
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