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Here's a brief overview: Soil Compressibility 1. *Definition*: Soil compressibility refers to the reduction in soil volume due to applied loads, causing settlement and deformation. 2. *Factors Affecting Compressibility*: Moisture content, soil type, density, and stress history....
I am currently working on a project with several rooftop canopies with photovoltaic arrays across the campus. Many of these canopies are several feet above the main roof levels. We've reviewed ASCE 7-16 Sections 29.4.3 and 29.4.4 regarding wind loading on rooftop solar panels. Based on the...
We design solar carports, and have run into an issue that has been causing some issues at particularly short spans. According to ASCE7-16 Figure 30.7-1, we are allowed to interpolate between roof angle but there is no mention of interpolation for effective wind area. On many similar figures in...
Per Section 29.4.3, roofs, and other portions of the MWFRS must be designed for two cases: 1- The case where collectors are present. The loads from section 29.4.3 are applied to the roof over the footprint of the panels, and the standard roof wind loads are applied elsewhere. 2-...
I am designing a 560,000 square foot building with solar panels on over 75% of the roof area. Is ACSE 7-16 section 29.4.3 the appropriate provision to use for accounting for the wind load applied to the MWFRS or should another section of 7-16 be used, i.e. 29.4.1? Section 29.4.3 seems more apt...
Hi Thomas, My first take is similar to yours, that it might be an error. However note that for this section the commentary explicitly acknowledges that the zones are larger (see the last 2/3 of the first paragraph C29.4.3). Also I note that the figure in the commentary C29.4-1 repeats the...
The "Building Roof Plan" in Figure 29.4-7 of ASCE 7-16 indicated that the width of Zones 2 and 3 is 2h where h is the height of the building at the eaves. Shouldn't this read 0.2h, which would be more in line with Figures 28.3-1, 28.5-1, 30.3-1 and, more applicably, 30.4-1 or 30.6-2 for flat...
I recommend using ASCE 7-22, which is now consistent with the 2017 edition of SEAOC-PV2. And I suggest reading all of Chapter 29 of ASCE 7-2. 2 The prescriptive pressure coefficients are plotted against the NORMALIZED effective wind area. This is not the same as the effective wind area. The...