- What is self straining force?
- What is exposure category?
- What units are used for wind speed?
- What is the importance factor for wind loads?
- What is exposure factor in staad?
- What is 3 second gust wind speed?
- How do you convert wind speed to pressure?
- What is the highest wind speed ever recorded on Earth?
- What is Risk Category II?
- What is ultimate design wind speed?
- What is basic wind speed?
What is self straining force?
It is: “Self-straining force arising from contraction or expansion resulting from environmental or operational temperature change, moisture change, creep in component materials, movement due to differential settlement, or combinations thereof.” ASCE 7 Sec.
What is exposure category?
Exposure category is based upon ground surface roughness, which is determined from the topography, vegetation, and existing structures. ASCE 7 defines three exposure categories: B, C and D. … Exposure D, structures located near shorelines or open water.
What units are used for wind speed?
The instruments used to measure wind are known as anemometers and can record wind speed, direction and the strength of gusts. The normal unit of wind speed is the knot (nautical mile per hour = 0.51 m sec-1 = 1.15 mph).
What is the importance factor for wind loads?
It is utilized in calculating flood, wind, snow, seismic and ice design loads. The Importance Factor is a multiplier that increases or decreases the base design loads. Typically, the base design loads are outlined by the code as a 2% annual probability of exceedence (2% in 50 years for seismic loads).
What is exposure factor in staad?
WIND LOADS IN STAAD-PRO Exposure factor (c) is the fraction of the influence area associated with the joint(s) on which the load acts. Exposure factors depends on the openings provided in the walls of the buildings.
What is 3 second gust wind speed?
So the wind speed averaged over a period of three seconds is taken as the standard definition of the gust speed, and “a three-second gust wind speed of up to 52 m/sec (115 mph)” means that 52 m/sec or 115 mph is the highest average speed measured over a three-second interval.
How do you convert wind speed to pressure?
Wind Speed Conversion (MPH) Ie: if the wind speed is 70 mph, the wind pressure is 0.00256 x 702 = 12.5 psf.
What is the highest wind speed ever recorded on Earth?
231 miles per hourFor nearly sixty-two years, Mount Washington, New Hampshire held the world record for the fastest wind gust ever recorded on the surface of the Earth: 231 miles per hour, recorded April 12, 1934 by Mount Washington Observatory staff.
What is Risk Category II?
Risk category II: Commercial buildings-Businesses, assembly buildings, educational and institutional occupancies with an occupancy load of three hundred (300) or more.
What is ultimate design wind speed?
Ultimate wind speed = 137 mph. Nominal wind speed = 105 mph. Design wind pressure W = 37.2 psf.
What is basic wind speed?
Basic wind speed is the wind speed that is used in determining wind load on the solar structure. It is often in the form of maximum 3-second averaging wind speed for 300 return years at 33ft height above ground or maximum 10-minute averaging wind speed for 50 return years at 10m height above ground over the open field.