Investigation of the june 3, 2006, collapse of Grandview triangle Essay

Investigation of the june 3, 2006, collapse of Grandview triangle bridge in Kansas City, MO (crane accident) - Essay Example The bridge deck was manufactured of nine concrete and a thick slab. The bridge had 12 spans of different length, whereby, the central girders were held in place by bents. The bents used to hold girders in place were made up of concrete. There were 11 bents in place connecting from east to west. On the other hand, girders were situated between flanges United (States Department of Labour, 2006). The picture below indicates that the bridge was made in such way that it appears as non-disjoint beam. As part of the Grandview Triangle development plan, the Montessori Department of Transport was awarded contract to vandalize old bridge including their bents. Further, the contract involved constructing new bridges as soon as the old ones were demolished. The Track Hoe Crane Company were the manufacturer of Track hoe Crane that was involved the accident on 3rd June 2006 accident at Kansas City during demolition process of the old buildings. The track hoe crane had an approximate height was estimated to be eighty five percent above the old bridge that was being demolished. On the contrary, the crane used in this demolition was weighing approximate seventy two thousand and eight hundred pounds. In addition, the load of the hoe crane had a capacity of 18percent during the collapse of the bridge (States Department of Labour, 2006). Various factors were involved in this accident. The following are the factors involved in the accident; the location of the hoe crane, the girder, expertise of the construction engineers who were involved in the demolition of the old bridges. It can be observed that the location of the crane was an important factor that contributed to the accident. The crane was placed located at the midst of the bridges, such location and the pressure that was being employed by the cranes led to the accident as the force was not uniformly distributed. Further, the pressure of above eighteen percent above the strength of the yield was quite

Discuss paper Essay Example | Topics and Well Written Essays - 250 words

Discuss paper - Essay Example It should be noted that there were a couple of preliminary injections that were injected in the crayfish before using 5HT antagonist for stress exposure within the body. In order to make sure that the research data was not flawed, the researchers made all the hemolymph samples at the same time. Notably the timings were marked to be 10am to 1pm. In addition, the process involved the usage of 25  µl with the string was noted in order to insert in the soft cuticle (Fossat et al. 2014). The analysis of the data gathered during the research work was critically analyzed using non-parametric tests. This is a statistical test which ensures reliable results for research works associated with animal stress. As mentioned in the research paper, the result of the research work marked that there is an avid difference between a stressed and non-stressed animal by â€Å"glucose titers at t=0 (0, 05 ±0, 01  µg/ µl, n=8), t=30 151 (0, 06 ±0, 01  µg/ µl, n=7) and t=60 min (0,076 ±0,007  µg/ µl, n=3) (Fossat et al. 2014)†. The results of the research have surely made researchers give a new thinking schema when it comes to stress in