C&C Wind Loads on Roof Overhang per ASCE 7-10 Figure 30.5-1
C&C Wind Loads on Roof Overhang per ASCE 7-10 Figure 30.5-1
Asce 7 10 Chapter 30 Pdf
Hello,
I am designing a building per Ch. 30 part 2 of ASCE 7-10. I have the MWFRS pressures and the component and cladding (C&C) pressures for the walls and the roof taken directly for Fig. 30.5-1. I'm struggling a little with the roof overhang C&C pressures. My building requires a basic wind speed of 120 mph.
Why doesn't the 'Roof Overhang net Design Wind Pressure' table of Fig. 30.5-1 include a basic wind speed for 120 mph? Why does 30.10 state 'The design wind pressure for roof overhangs of enclosed and partially enclosed buildings of all heights, except enclosed buildings with h <= 160 ft for which the provisions of Part 4 are used, shall be determined from the following equation:...', which seems to contradict the fact that there is a table in Fig. 30.5-1 titled 'Roof Overhang net Design Wind Pressure'.
I looked for errata on this, but I didn't find anything. I must not be understanding something here.
Thanks!
EIT
I am designing a building per Ch. 30 part 2 of ASCE 7-10. I have the MWFRS pressures and the component and cladding (C&C) pressures for the walls and the roof taken directly for Fig. 30.5-1. I'm struggling a little with the roof overhang C&C pressures. My building requires a basic wind speed of 120 mph.
Why doesn't the 'Roof Overhang net Design Wind Pressure' table of Fig. 30.5-1 include a basic wind speed for 120 mph? Why does 30.10 state 'The design wind pressure for roof overhangs of enclosed and partially enclosed buildings of all heights, except enclosed buildings with h <= 160 ft for which the provisions of Part 4 are used, shall be determined from the following equation:...', which seems to contradict the fact that there is a table in Fig. 30.5-1 titled 'Roof Overhang net Design Wind Pressure'.
I looked for errata on this, but I didn't find anything. I must not be understanding something here.
Thanks!
EIT
Asce 7-10 Chapter 30
ASCE 7-10 'Minimum Design Loads for Buildings and Other Structures' contains several changes regarding wind loads. The major editorial change is a complete reorganization to a multiple-chapter format as done previously for seismic loads with the objective being to make the provisions easier to follow. Of this chapter, by the Directional Procedure of Chapter 27, or by the Wind Tunnel Procedure of Chapter 31. 28.6.2 Conditions For the design of MWFRS the building shall comply with all of the following conditions: 1. The building is a simple diaphragm building as defi ned in Section 26.2. The building is a low-rise building as defi ned in.