To dig a foundation, an excavation is being placed next to an adjacent building.

To dig a foundation, an excavation is being placed next to an adjacent building. Even though tiltmeters and other instruments will be installed to monitor possible incipient failure of the shoring, the insurance company has requested that the consequences of possible shoring failures be investigated. As a first step to estimate these consequences, determine:

1. If the building will remain stable if failure occurs only under one footing of one exterior column (i.e., take advantage of moment framing in both directions in this evaluation)—consider both the cases of corner columns and noncorner columns.

2. If the building will remain stable if the shoring fails adjacent to all of the exterior footings of that building located next to the excavation (i.e., the exterior row of columns’ foundation support is completely gone).

3. The maximum compressive load the building can put on the soil adjacent to the shoring in the even of a major earthquake or wind storm. For all beams, Z = 144 in3 and Fy = 36 ksi. The columns can be assumed to be stronger than the beams. The frames are spaced at 20 ft center-to-center from each other. The actual floor live load acting on the frame is 20 per square ft (psf), the design floor live load is 50 psf, and the dead load is 120 psf. Neglect overturning of the building and catenary action (i.e., small displacement theory still applies).

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The agave bush and the desert tortoise are both found in the Sonora Desert in the Southwest of North America. Known as the century plant, the agave blooms in June to August but only once after about 25 years and then dies. In contrast, tortoises may live in excess of 100 years and when they reach the age of around 15 years they lay eggs between May and July at 2-3 year intervals. What type of reproductive strategy is demonstrated by each of these species? View keyboard shortcuts As previous stated, tortoises may lay multiple clutches of eggs with varying numbers per clutch depending on the amount of rainfall during the summer monsoon season in the desert. In general more rain results in 1 or two more clutches per season and more eggs per clutch. Would this be a density dependent or density independent factor with respect to population growth of tortoises and what specifically in the information above made you come to this conclusion? Desert tortoises may live up to 100 years and don't reach sexual maturity typically until 15 years of age. Based on all the information presented on tortoises in this quiz, would consider them to be more or a r or K selected species and what are two specific facts from the information presented that support your conclusion? Assume a population of desert tortoises has a per capita growth rate (r) or 0.039. If this rate could be sustained, how long would it take for the population that is currently 186 individuals to reach 450 individuals? (just give the simplest expression with the data provided)

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