Agriculturally exempt buildings should be designed with. You want a 30 foot tall pole to mount two lithonia lighting kad series light fixtures at 180 degrees from each other to illuminate a small parking lot located in a 90 mph wind region. If the flag dimension is known, we must consider a certain percentage of the flag area to catch wind drag force. Effective analysis of pole loading factors shall not only assist efficient distribution of electric utilities, but also help estimate and mitigate the risk factors associated with each overhead line. Determine the constantmoment curve safeoperating curve at the base of the tower, based on the tower manufacturers windload specification, as a function of tower height and wind velocity for any. Since we assumed an h1 pole for the wind loading on the pole calculation, we will have to recalculate for a h2 pole to be sure we are ok. Tower and antenna wind loading as a function of height. Ieee covers the basic provisions for the safe installation and operation of aerial and buried power and telecommunication facilities within the. Ground set cone tapered aluminum flagpoles wind chart.
Best practices for wood pole strength and loading euci. Pole loading 101 why perform pole loading analysis. This step almost always involves pole loading software, such as poleforeman, ocalc, and spida. This easy to use calculator will display the wind speed by location via a wind speed map as prescribed by the above building codes. Mecawind is a software program used to calculate wind loads andor wind pressures on the main wind force resisting system mwfrs of buildings and many other structures chimneys, tanks, towers, open signs, closed signs, solar panels, rooftop equipment, canopy, bins, tanks, silos and free standing walls.
Good inspection data is critical to any strength rating calculation and the aluminum inspection tag that is placed on the pole tells the basic history of what has, or has. How to calculation the wind load for lighting pole. Using its powerful geometric nonlinear, finiteelement analysis engine to perform comprehensive pole loading, pole strength, and clearance analyses, spidacalc brings awareness to asset health and ensures safety code compliance. Pole loading analysis guidelines for austin energy infrastructure. Also included are column buckling and guying modules. Once the pole survey is completed, the information can be handed over to a pole loading professional for analysis. This design moment is then checked against the maximum allowable design moment for the high. Spidacalc is the industrys leading structural analysis and design software. Wind exerts a force on the pole as well as the flag, thus both loads must be added to determine total load. In order for a structure to be sound and secure, the foundation, roof, and walls must be strong and wind resistant. Augment your existing pole loading expertise and resources. Adding to skycivs already list of free tools, is the new wind load calculator for asce 710, as 1170.
The national electrical safety code nesc published by the institute of electrical and electronics engineers, inc. Obviously, it is important that flagpoles be selected which are capable of supporting the largest flag intended to be flown in the highest wind speed to which it will be subjected. For example, when the extreme wind loading nesc rule 250c was revised in the 2002 nesc, we were able to implement that change immediately using the poleforeman software. Post wind load calculation software pole wind load software. It is based upon the asce 7 standard used throughout the united. The weight of the wires and their coating of sleet, together with the weight of crossarms.
They can also take pls pole structures and spot them in a line. Asce 710 wind load pressure software wind software. It allows the user to specify the wind speed as well as the areas of the signal lights or signs parallel to the x and y axis. Plspole is a powerful and easy to use microsoft windows program for the analysis and design of structures made up of wood, laminated wood, steel, concrete and fiber reinforced polymer frp poles or modular aluminum masts. Linedesign engineering pole loading software consulting. In so doing, the program calculates the applied loads on the corresponding nodal points internally, based on the specified element areas of the light elements in. The nature of the structures under consideration lead to the development of this analysis technique, which is a combination of the two methods. Wind and ice loading districts nesc also specifies two environmental loading conditions wind and icewinter storm which the poles must withstand. The three types of buildings were analyzed for one condition of loading only, namely, that of wind loading alone with the windward side of the building at least 30 percent open. Ocalc pro features an advanced userinterface and calculation tools that make it a highly accurate and productive application for performing comprehensive pole loading analyses for joint use, equipment or line upgrades, system hardening, and pole replacement. The lowstress way to find your next o calc pole loading job opportunity is on simplyhired. Pole loading and pole remediation programs a variety of inspection and inservice treatments are performed on wooden utility poles to ensure a strong and safe wood pole plant. Use the lighting pole manufacturers epa effective projected area and apply the appropriate amount of wind based on the area placed at the top of the pole.
Pole loading analysis guidelines for austin energy. The wind loading is calculated as per the below procedure, it is then converted to an effective wind pressure which creates a design bending moment acting on the high mast light pole. The program performs design checks of structures under user specified loads and can also calculate maximum allowable wind. Pole loading analysis pole loading factors for utility. There are over o calc pole loading careers waiting for you to apply. New o calc pole loading careers are added daily on. High mast wind loading is the main source of loading acting on high mast light poles in service. Osmoses pole loading analysis services allow you to.
May 22, 2015 stub pole analysis osmose utilities services ocalc pro. The new options include automatic loading as per asce 741991, asce 742009, nesc 2002, 2007, 2012. You need to take into account any fixtures that might be attached to the pole. Flag pole structural engineering general discussion engtips.
In areas such as foothills or mountain passes, where hills and local. Aabsys is a leading provider of pole loading analysis services for the utilities industry. Once the model is correctly built in the software, the load on the pole is calculated often with the new build included and analyzed. Analyze transverse pole moments due to conductors, cables and other equipment, including cantilever eccentric loading.
For tangent poles and small line angle poles, the direction of critical loading for conductors is transverse. Users of our plscadd line design program can use pls pole to prepare allowable wind and weight span or interaction diagram files for optimum spotting. Cities, contractors, utility companies, engineers and planners to analyze the effects of wind on wooden and light weight steel utility poles. Utility poles must be designed and built with certain safety aspects in mind. For example, if the wind speed is 70 mph, the wind pressure is 0. Ieee covers the basic provisions for the safe installation and operation of aerial and buried power and telecommunication facilities.
Polefdn is a spreadsheet program written in msexcel for the purpose of analysis of a pole foundation assuming the use of a rigid round pier which is assumed free at the top and subjected to lateral and vertical loads. Asce 716, posts poles wind load calculator wind load. External forces are due to dead, ice and wind loads, which with the exception of the pressure on the pole must be transmitted to the pole by the wires. Along with the foundation system, the primary force a pole must withstand is from wind. The spacing between the pole frames ranged from 12 to 20 feet. Asce 716, posts poles wind load calculator quantity. Utility line design has over twentyfive planned calculations that will be added to the website at no added charge in the coming months.
Flat and open terrain may cause wind induced pole vibrations that may require special attention see page 5 for more information regarding the effects of pole vibration. Wood pole design considerations page 4 usually, there is only one direction of loading that dictates the minimum class of a wood pole that will adequately support all the applicable loads. Mike the pole barn guru takes issue with ignoring wind load when designing pole buildings. Download geotechnical engineering software polefdn 2.
Jan 20, 2017 once the pole survey is completed, the information can be handed over to a pole loading professional for analysis. For any questions about our windload or foundation calculation services, please contact inside sales. Ocalcpro is structural analysis software for utility poles. Plscadd can calculate the loading on a structure at a particular location and display the results of a pls pole check with those. Pole owners often lack the resources to provide indepth analysis of structures for planning and design projects. In designing flag poles for the post and the foundation, one must consider wind forces on the pole as well as wind forces on the flag. Simply use external flow and resize the computational domain as you see fit. The weight of the wires and their coating of sleet, together with the weight of crossarms, insulators and the pole itself is a vertical load which the pole carries as a column. Pole loading with spidacalc spida c alc is an industrywide approved and accepted pole loading software application used by many entities i. Function of electrical pole is that of a cantilever beam rather than of a column. Accurate pole loading calculations are important when reporting to regulatory bodies for compliance purposes, determining the impact of additional attachments, or designing pole replacements. Pole loading analysis pole loading factors for utility data. This document is intended to provide guidelines for third party vendors who perform pole loading analysis pla on austin energy ae infrastructure. It also specifies safety factors that must be met in order for a.
Structural analysis is a prerequisite for many design initiatives. The quarterwave impedance transformation calculator is used to match an input and an output impedance at a given frequency for maximum power transfer. Because of the variety of pole shapes, heights, size and quantity of luminaires to be supported including other items that may be attached to the. Csa defines pole grades as either 1, 2, or 3, and are a combination of upper most circuit class and situation at crossing. Stub pole analysis osmose utilities services ocalc pro. The minimum diameter for an 80foot h1 class pole at ground line is 18. May 22, 2015 overview of and introduction to ocalc pro part 1 osmose utilities services ocalc pro.
Direct integration includes spida softwares spidacalc pole loading analysis solution and other thirdparty systems. Meet regulatory requirements for pole loading related to storms, wind, fires, and hurricanes. When building a structure it is important to calculate wind load to ensure that the structure can withstand high winds, especially if the building is located in an area known for inclement weather. Overview of and introduction to ocalc pro part 1 osmose utilities services ocalc pro. The unit for wind pressure is pounds per square foot psf. Wind loads are important consideration in structural engineering in the design of a structure. Unless you have a scaled model that you are going to put in a wind tunnel and you just want to verify your cfd results, theres no reason to use such a device. Atlas handles the wind loading in a realistic manner. The wind pressure coefficients used were those recommended by the. About us lyte poles was founded to meet the continued focus on partner demands for highquality, lowcost, and technologically advanced products. Flag pole structural engineering general discussion. Design and analysis of high mast solar light pole for two. Make the most out of your pole loading data with spidas comprehensive asset management software solution.
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