Velocity pressure exposure coefficients, K z are listed Table 27.3-1 of ASCE 7-10 or can be calculated as. Simply select the input unit, enter the value and click "Convert" button. (Equation 16-33) where: Vasd = Allowable stress design wind speed applicable to methods specified in Exceptions 4 and 5 of Section 1609.1.1. Where a "user note . In order to convert the load . V is the basic wind speed. Chicago's 66 year peak wind gust. The wind speed indicated for each wind speed line is different for the 2010 standard due to change in wind Now find the unit you want and get the conversion result next to it. UBC Exposure: Exposure B * Exposure C * Exposure D * Height Above Ground: 0 - 15 feet 20 feet 25 feet 30 feet * Exposure B has terrain with buildings, forest or surface irregularities, covering at least 20 percent of the ground level area extending 1 mile (1.61 km) or more from the site. Roof height is dimension h in the photo below and is taken from a point between the eve and the peak of the roof. Properties of Welds Treated as Lines Calculator. The following chart is provided to clarify the DP rating requirements for each design wind speed per the International Residential Code and the Guidelines for Hurricane Resistant Residential Construction. 5 kPa to psf = 104.42717 psf. Pound per square inch (psi) 0.01. Example: 10 in. the elusive nautical mile) with our calculator. See Also. 1620.2 Wind velocity (3-second gust) used in structural calculations shall be as follows: . Type in your own numbers in the form to convert the units! Figures. 4 kPa to psf = 83.54174 psf. Transferring this to American unit's yields: q= (V^2)/383.6 where q is the pressure in PSF and V is the velocity in mph. Metric Conversion > Metric . It's your answer. Wind Speed Converter - Convert wind speeds between Miles per hour, kilometers per hour, knots, metres per second, feet per second : Online Calculators - Online Converters - Unit Measurement Translators Metric <-> Imperial <-> Metric : Wind Speed Converter : Custom Search Wind Load Calculator In order for a structure to be sound and secure, the foundation, roof, and walls must be strong and wind resistant. Some building codes specify wind speed/velocity in MPH (miles per hour in English units), while others specify the resulting wind pressure in PSF (pounds per square foot in English units). Window Glass Design is a web application that determines the load resistance of glass in buildings using the ASTM E1300-16 Standard Practice for Determining the Load Resistance of Glass in Buildings. Energy Conversion Calculator. Ultimate . Torque Transmitted by Clutch Calculator . N o teh asingl pr duc m y qualify for multiple performance classes. miles per hour (mph) knots (kt) meters per second (m/s) kilometers per hour (km/h) feet per second (ft/s) Beaufort More Meteorological Conversions and Calculations It is the force component parallel to the surface, per unit area . The following chart is provided to clarify the DP rating requirements for each design wind speed per the International Residential Code and the Guidelines for Hurricane Resistant Residential Construction. dp-psf _____ (X .6) 24.3/-26.34 27.66/-30. This is state 2. Note: Beaufort cannot be entered because it would result in a range of numbers. For example, a window with a design pressure of 30 has a square root of about 5.48 and is designed to withstand winds of up to 110 miles per hour (5.48 times 20.016). Kilopound per square inch (ksi) 6.9410 -6. H2OPamph kph 1.0 1 0.2 48 20 32 72.5 48 13.9 3471 168 271 1.6 1 0.3 75 25 40 75.0 50 14.4 3591 171 275 . The unit for wind pressure is pounds per square foot (psf). Wind pressure is given by the equation P = 0.00256 x V2, where V is the speed of the wind in miles per hour (mph). For using the actual sustained wind speed expected (were we to actually determine it) : Force, F = A x P x Cd. Wind causes pressures and suctions on wall and roof surfaces of buildings. Positive (+) pressures act inward and Negative (-) pressures act outward on the window. Total pressure is thus 15 + 0 = 15 psi. Re: Wind - MPH to PSI ?? Properties of Welds Treated as Lines Calculator. Using the conversion formula above, you will get: Value in psi = 2400 0.00014503773800722 = 0.348091 psi. Wind Zone 3 150 mph (58 m/s) ultimate design wind speed, V. ult. In addition to our wind speed converter, you can also convert distances (e.g. Kz = 2.01 (z/zg)2/. An easier way to perform this calculation would be as follows: Square Root of PSF X 20.016 (e.g. Wind Speed Comparison Chart Conversion Formulas The wind speed converter uses the following conversion formulas: Wind (kts) = 0.8689762 Wind (mph) Wind (kts) = 0.5399568 Wind (km/h) Wind (kts) = 1.9438445 Wind (m/s) Wind (mph) = 0.621371 Wind (km/h) Wind (mph) = 2.236937 Wind (m/s) Wind (mph) = 1.15077945 Wind (kts) Laser Real Time Unit Converter . Flat-roof snow load, P f. 2. Enter temperature and wind speed to compute wind chill. 6.2.2.3 . 3 kPa to psf = 62.6563 psf. For example, if the wind speed is 70 mph, the wind pressure is 0.00256 x 702 = 12.5 psf. inch) 50.125095181 psf (pounds per sq. Where required, the basic design wind speeds of Figures 1609.3 (1) through 1609.3 (8) shall be converted to allowable stress design wind speeds, Vasd, using Table 1609.3.1 or Equation 16-33. 1 kPa to psf = 20.88543 psf. 0.348090939 psi (pounds per sq. foot) The pressure value 2400 Pa (pascal) in words is "two thousand, four hundred Pa (pascal)". 2. Type the number of Inch of water (inH2O) you want to convert in the text box, to see the results in the table. Enter a speed into any blank to convert to all other wind speeds. 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. Energy Conversion Calculator. Wind Speed Conversion. The ultimate design wind speed, V ult, in mph, for the determination of the wind loads shall be determined by Figures 1609.3(1), 1609.3(2) and 1609.3(3). For Example, Speed of 100 mph gives 26.07 PSF. basically I have a type of wall cladding panel that is rated for a certain amount of load per square foot, with its supporting wall girts at another spacing, as follows Panel - 5/16" thick (48" wide) for a maximum deflection of 1" 15 psf = support member spacing = 32" 30 psf = supporting member spacing = 22" Suppose you want to convert 2400 Pa into pounds per square inch. 15 psf (720 Pa) for R class; 25 psf (1,200 Pa) for LC class; 30 psf (1,440 Pa) for CW class; and 40 psf (1,920 Pa) for AW class. Also new in ASCE 7-16, a ground elevation factor (Ke) can be used to reduce pressures at higher elevations, or it can more conservatively be set to 1.0. The force on an object is going to depend on many things, not just cross sectional area. Exposure typically, exposure B is 120 mph and less and exposure C is 130 and higher. The essential takeaway from this abbreviated "seminar" is that there is a difference between design pressure and performance grade. Plug the values into the equation and calculate your answer: Pressure = 0.5 x 1.05 x 1.25kg/m^3 x (11m/s)^2 = 79.4 N/m^2. Wind speed units & wind directions Being able to quicky convert wind speed values from units like knots, beaufort, m/s and km/h to another is quite helpful when you're in a pinch. 28 HVHZ 1620.2-Change to read as shown. = 3.87 X 20.016 = 77.52) Ultimate wind speed = 137 mph: Nominal wind speed = 105 mph: Design wind pressure W = 37.2 psf: Design wind pressure W = 21.9 psf: Wind LRFD load combination = 1.0W = 37.2 psf: Wind LRFD load combination = 1.6W = 35.0 psf: Wind ASD load combination = 0.6W = 22.3 psf: Wind ASD load combination = 1.0W = 21.9 psf outward on the window. Note to Reader: This document provides the wind resistant provisions of the 2015 International Building Code and is not intended to be a compilation of all the structural and non-structural provisions of the IBC. Laser Real Time Unit Converter . Kd is wind directionality factor. Wind Conversion Calculation for DP Ratings (continuation fron Page 1) Step 3 Choose your roof height and exposure. A conversion from Load Resistance Factor Design (LRFD) is provided. This is state 1. Enter a depth into any blank to convert to other units . dp-psf _____ (X .6) 24.3/-26.34 27.66/-30. 2. Wind load case must be enabled inside of an analysis set: Segment Tab on the input grids: Load> Static Analysis Sets> modify analysis set: 30.66/-33.6 27. Isentropic Flow Relations Calculator. Note: Search the internet for wind calculator to help with this calculation. The equivalent wind force is assumed to act through the centroid of the element. For SI: 1 foot = 304.8 mm, I mile per hour = 1.609 km/h, 1 psf = 47.88 N/m 2 Nominal Design Wind Speed (Vasd) converted from Ultimate Design Wind Speed per Section 1609. Wind Load Vs. PSF Wind Pressure of Basic Speed is: q= (V^2)/1.6 {V to the power of 2 divided by 1.6} Where q is the pressure in Pa and V is the wind velocity in m/sec. . The ultimate design wind speed, V ult, for use in the design of Risk Category III and IV . Convert mph to meters per second (m/s) by multiplying the speed in mph by 0.447. Shaft Speed Calculator. Wind velocity for a pressure of 31 pounds/square foot is about 76 mph, give or take (for a flat surface.) The FT Technologies Wind Speed Converter allows you to convert between different wind speed measurement scales. Enter temperature in one blank to convert to the other scale. Formula: WC 27.708 = PSI. Solution: Convert MPH to PSF: (MPH ^2) *0.00256 . Your value gets instantly converted to all other units on the page. V = Velocity (MPH) DP = (Design Pressure ASTM E330) DP = 0.00256 x V 2 Vasd = Nominal design wind speed: Vasd = DP / 0. qz = 0.613 Kz Kzt Kd V2 (N/m 2 ); V=m/s. WALLS PAGE 2 OF 2 B C 1 . Metric Megapascal (MPa) Bar kgf/cm Kilopascal (kPa) Hectopascal (hPa) Millibar kgf/m Pascal (Pa) Avoirdupois (U.S.) Kilopound per square inch (ksi) Pound per square inch (psi) Pound per square foot (psf) Water Metre of water (mH2O . Cd, Drag coefficient, = 2.0 for flat plates.For a long cylinder (like most antenna tubes), Cd = 1.2. 1. 2 kPa to psf = 41.77087 psf. knots. .26 psf. This converter can help you to get answers to questions like: Pound per square foot (psf) 1. Wind Force / Sideload Calculator. This is simple to use online converter of weights and measures. Where material that was not specific to wind was removed from a code section, "partial shown" is indicated. Since the wind pressure loads are a function of velocity squared, the most extreme design loads If anyone can help I would appreciate it. Wind Speed to Static Pressure Differential Static Pressure Differential Wind Speed Wind SpeedStatic Pressure Differential. 2. 28 HVHZ 1620.2-Change to read as shown. For example, if the wind speed is 70 mph, the wind pressure is 0.00256 x 70 2 = 12.5 psf. Quick conversion chart of kPa to psf. A 4/3 increase in allowable stress has not been used . For example, an FM I-90 classification designates a tested design uplift resistance of 45 psf of the roofing system. Figure 3) presents the basic wind speed map, which provides design 3sec gust values at 33 ft in flat, open terrain. Isentropic Flow Relations Calculator. This means that the new static pressure is now 15 psi - 0.17 psi = 14.83 psi, such that: Convert Design Pressure (PSF) to Wind Speed (mph) Design Pressure: * Wind Speed (mph): Wind Conversion Calculation for DP Ratings (continuation fron Page 1) Step 3 Choose your roof height and exposure. First, take the square root of the rated design pressure, then multiply it by 20.016. In order to convert the load . Enter a speed into any blank to convert to all other wind speeds. Air Flow Calculator - Determine the air volume flowing past a point in the duct per unit of time . 30.66/-33.6 27. Roof height is dimension h in the photo below and is taken from a point between the eve and the peak of the roof. E = 60 PSF (2880) 100 PSF (4790) WIND LOAD CHARTS Mullions are designed for L/175 deflection limitations . Problem: How to convert from wind loads from MPH to PSF in AutoPIPE? While these ratings generally hold true, exceptions apply. Ie: if the wind speed is 70 mph, the wind pressure is 0.00256 x 70 2 = 12.5 psf. A = The projected area of the item. Enter temperature and wind speed to compute wind chill. Torque Transmitted by Clutch Calculator . multiplied by itself and then by 0.004 gives wind s pressure in pounds per square foot. 1620.2 Wind velocity (3-second gust) used in structural calculations shall be as follows: . The value will be converted to all other . DP Rating For Design Wind Speeds (based on 2006 IRC - Table R301.2(2) & 2005 Hurricane Guide - Table 602A) . Design Wind Pressures for Components and Cladding (psf) Design Wind Speed: 130 MPH Building Roof Height (ft) Exposure B Exposure C 15 +35.8 / -47.9 +43.3 / -58.0 30 +35.8 / -47.9 +50.1 / -67.1 45 +40.2 / -53.8 +54.6 / -73.1 The wind speed must be in meters per second for the equation to be accurate. To convert ultimate wind loads to nominal loads, multiply ultimate wind loads by a factor of 0.6 per ASCE/SEI 7. p=pressure in psf V=wind velocity in mph the constant, 0.00256 corresponds to the mass density of air at standard atmospheric pressure and temperature, with the appropriate unit conversions applied. Enter temperature in one blank to convert to the other scale. Exposure typically, exposure B is 120 mph and less and exposure C is 130 and higher. Meteorological Conversions. m/s (meters per second) How does that 2000 psi compare or convert to the wind driven rain pressure on the windows. This . 160 mph (63 m/s), or 140 mph (54 m/s) ultimate design wind speed, V. ult P=rho (air density)times the square of the velocity. The SI unit of speed is the meter per second, but in our daily lives, the most commonly used unit of speed are the kilometer per hour or, in the USA and the UK, miles per hour. H2OPamph kph psf DP in. The pressure acting the surface transforms to a force Fw = pd A = 1/2 v2 A (1) where Fw = wind force (N) A = surface area (m2) pd = dynamic pressure (Pa) = density of air (kg/m3) v = wind speed (m/s) Note - in practice wind force acting on a object creates more complex forces due to drag and other effects. In the continental U.S., the wind speeds range from 90 mph to 150 mph. Click to see full answer. Wind Load Calculator Wind (kn) = 1.9438445 x Wind (m/s) Conversion formula for meters per second to kilometers per hour: Wind (km/h) = 3.6 x Wind (m/s) Wind (m/s) = 0.277778 x Wind (km/h)