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Unpack the code through illustrations and descriptions.

Asphalt shingles installed over a roof deck complying with Section 1609.5.1 shall comply with the wind-resistance requirements of Section 1504.1.1. b = Exposed width, feet (mm) of the roof tile. The total area used to determine the distributed load shall be the area of the fabric face between the framing members to which the fabric is attached. Other loads and combinations in accordance with Section 1605 shall be accommodated.

Solar photovoltaic panels or modules in this application are not permitted to be classified as "not accessible" in accordance with Section 1607.13.5.1. GCp = Roof pressure coefficient for each applicable roof zone determined from Chapter 30 of ASCE 7. The tile shall be single lapped interlocking with a minimum head lap of not less than 2 inches (51 mm). Projects provide a dedicated space to collaborate on code research.

Islands and coastal areas outside the last contour shall use the las wind speed contour of the coastal area. The full-scale tests indicated that the turbulence observed in the wind tunnel studies from the 1970s, that many of the current roof pressure coefficients were based on, was too low.

A concentrated load of 40 pounds (0.176 kN) applied to an 8-inch-diameter (203 mm) area [50.3 square inches (32 452 mm.

Example of ASCE 7-16 Risk Category II Hawaii effective wind speed map. The length of the tile shall be between 1.0 and 1.75 feet (305 mm and 533 mm). Urban and suburban areas, wooded areas or other terrain with numerous closely spaced obstructions having the size of single-family dwellings or larger. Foundation walls and retaining walls shall be designed to resist lateral soil loads.

There are two methods provided in the new Standard. The adjustment can be substantial for locations that are located at higher elevations. See ASCE 7-16 for important details not included here.

Printed with permissionfrom ASCE. The roof tiles shall be either loose laid on battens, mechanically fastened. To complete your registration, please verify your email address.

The deflection of steel structural members shall not exceed that permitted by AISC 360, AISI S100, ASCE 8, SJI 200 or SJI 100, as applicable. Roof structures that support photovoltaic panel systems shall be designed to resist each of the following conditions: Applicable uniform and concentrated roof loads with the photovoltaic panel system dead loads. Structures that require special consideration of their response characteristics and environment that are not addressed by this code or ASCE 7 and for which other regulations provide seismic criteria, such as vehicular bridges, electrical transmission towers, hydraulic structures, buried utility lines and their appurtenances and nuclear reactors. Where allowable stresses have not been increased or load combinations have not been reduced as permitted by the material chapter of this code or the referenced standards, (ω) shall be taken as 1.

Design spectral response acceleration parameters. Please change your password.

Exception: The vehicular live loads and load placement are allowed to be determined using the actual vehicle weights for the vehicles allowed onto the garage floors, provided that such loads and placement are based on rational engineering principles and are approved by the building official, but shall be not less than 50 psf (2.9 kN/m2). The exemption for interconnection of smoke alarms in existing areas has been deleted. The Alterations Level 2 requirement that water for automatic fire sprinkler system be available at the floor of alteration without the need for a fire pump has been moved to Chapter 9 for Alterations Level 3 and the fire pump criterion was deleted.

The basic design wind speed, V, in mph, for the determination of the wind loads shall be determined by Figures 1609.3(1) through (8). Where storm shelters are required based on IBC and ICC 500 for Group E Occupancies, any addition to such existing occupancies where the occupant load of the addition is 50 or more will trigger the construction of a storm shelter. Where the phrase "undeflected roof" is used, deflections from loads (including dead loads) shall not be considered when determining the amount of rain on the roof.

The wind speeds in the northern Great Plains region remain approximately the same as in ASCE 7-10. Wind speeds correspond to approximately a 1.7% probability of exceedance in 50 years (Annual Exceedance Probability = 0.00143, MRI = 700 Years).

The new Ke factor adjusts the velocity pressure to account for the reduced mass density of air as height above sea level increases (see Table). The text of Section 6.2.2 of ASTM E1996 shall be substituted as follows: 6.2.2 Unless otherwise specified, select the wind zone based on the basic design wind speed, V, as follows: 6.2.2.1 Wind Zone 1—130 mph ≤ basic design wind speed, V < 140 mph. A diaphragm is rigid for the purpose of distribution of story shear and torsional moment when the lateral deformation of the diaphragm is less than or equal to two times the average story drift.

Structures classified as Risk Category I, II or III that are located where the mapped spectral response acceleration parameter at 1-second period, S1, is greater than or equal to 0.75 shall be assigned to Seismic Design Category E. Structures classified as Risk Category IV that are located where the mapped spectral response acceleration parameter at 1-second period, S1, is greater than or equal to 0.75 shall be assigned to Seismic Design Category F. Other structures shall be assigned to a seismic design category based on their risk category and the design spectral response acceleration parameters, SDS and SD1, determined in accordance with Section 1613.2.4 or the site-specific procedures of ASCE 7.

The longitudinal force on crane runway beams, except for bridge cranes with hand-geared bridges, shall be calculated as 10 percent of the maximum wheel, In order to meet the structural stability requirements of, Buildings, structures and parts thereof shall be designed to withstand the minimum wind, Garage door glazed opening protection for windborne debris shall meet the requirements of an, For each wind direction considered, an exposure category that adequately reflects the characteristics of ground surface irregularities shall be determined for the, For each selected wind direction at which the wind, Roof systems shall be designed and constructed in accordance with Sections, Roofs equipped with hardware to control the rate of drainage shall be equipped with a secondary drainage system at a higher elevation that limits accumulation of water on the roof above that elevation.

The zones are shown best in the Commentary Figure C30-1 as shown in Figure 6.

It is necessary to look at the impact of the provisions as a whole, instead of individually, to understand how design procedures are affected.▪, Donald R. Scott is a Senior Principal at PCS Structural Solutions, Tacoma, WA.
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