ASCE 7 16 EXAMPLES SERIES

Case C вЂ“ Stepped application of reduced wind pressures as the distance decreases from the windward edge.Д¬ase C вЂ“ Reduction in loads for walls or signs with.Case B вЂ“ Load applied with an eccentricity of 0.2*B (width of the wall or sign).Case A вЂ“ Load applied to the centroid of the area.As = the gross area of the solid freestanding wall or freestanding solid sign, in ft2 (m2) G = gust-effect factor from Section 26.9 c. Section 29.4.1 вЂ“ Solid Freestanding Walls and Solid Freestanding Signs 29.4-1) as determined in accordance with Section 29.3.2 В» h = top of the wall or sign В» Note: qh is at the top of the sign or wall and Kd in Eq 29.3-1 is the Kd of Solid Freestanding Walls and Solid Freestanding and Attached Signs in Table 26.6-1 of 126 qh = the velocity pressure evaluated at height h (defined in Fig. If the area of openings exceeds 30% of the gross area, it is an open sign. Reduction factor can be applied to solid signs with openings. Solid Signs can have openings up to 30% of the Gross Area. Research is being conducted at Texas Tech University by Douglas Smith, PhD Signs which have openings that can be pressurized 1) Boxed signs 2) Signs made from sea containers 3) Signs with large internal areas for lights with translucent panelsДў. Be careful to use qz or qh, as directed under each section. Chapter 29, like Chapters 26-30, has its own table, Table 29.3-1, for Kh and Kz b. Steps 1-4 are the same as in Chapters 26-30. Reductions are afforded for Terrain Features in determining Exposure Categories in Chapter 26. Individual hills Individual trees or small groves of trees Individual levees and similar features. No reductions allowed for apparent shielding by buildings, other structures, or terrain features. If your structure does not fall within the listed limitations, it should probably be the subject of Wind Tunnel Study. This chapter DOES NOT consider: Unusual shapes or configurations that lead to effects listed in Section 29.1.2 вЂ“ Conditions. This chapter DOES consider: load magnification effect caused by gusts in resonance with along-wind vibrations of flexible structures. The structure does not have response characteristics making it subject to acrosswind loading, vortex shedding, or instability due to galloping or flutter or it does not have a site location for which channeling effects or buffeting in the wake of upwind obstructions warrant special consideration. Section 26.2.2 - BUILDING OR OTHER STRUCTURE, REGULAR-SHAPED: A building or other structure having no unusual geometrical irregularity in spatial form. The structure is a regular-shaped structure as defined in Section 26.2.2. Parapets Roof Overhangs Rooftop Structures and Equipment for Buildings with h в‰¤ 60 ft (18.3 m) Chapter 30 вЂ“ Part 6 - Components & Cladding for Building Appurtenances and Rooftop Structures and Equipment (Directional Procedure) a. i.Д¬onditions Limitations Solid Freestanding Walls or Signs Solid Attached Signs Design Wind Loads on Other Structures Design Wind Loads on Rooftop Structures and Equipment on Buildings Parapets Roof Overhangs Minimum Design Wind Loadings of 126 Chapter 29вЂ“ Other Structures (MWFRS Directional Method) a. Wind Loads for Solid Signs, Other Structures, Roof-Top Structures & Equipment, and Other Special Conditions Bob Paullus, P.E., S.E.

Robert Paullus, P.E., S.E., SECB Paullus Structural Consultants Дў6 February 2013 Wind Webinar #3 26 February 2013

ASCE 7 16 EXAMPLES SERIES

WIND WEBINAR SERIES #3: ASCE 7 10 Wind Loads for Signs, Other Structures, Roof Top Structures & Equipment, and Other Special Conditions

Asce 7 16 examples