Ceiling jib crane

U ovom završnom radu bilo je potrebno konstruirati konzolni granik uz dane zahtjeve. Prije svega, nosivost granika iznosi 0,5 t, radijus konzole je 3 m, dok je visina prostorije 4 m. Također, potrebno je bilo zadovoljiti i brzinu dizanja koja iznosi 10 m/min, brzinu vožnje vitla 15 m/min i brzinu rotacije granika od 2 okr/min. Kako je granik namijenjen za skladište logističkog centra, uz navedene parametre o kojima je trebalo voditi računa, bilo je poželjno osloboditi prostor na tlu. Pa je onda tako i tema ovog rada stropni konzolni granik. U uvodnom razmatranju analizirani su principi postojećih konstrukcijskih izvedbi te su ponuđena dva koncepcijska rješenja od kojih je jedno izabrano kao optimalna varijanta. Nakon uvoda slijedi proračun mehanizma za dizanje u skladu s važećim europskim normama za transportne uređaje, potom slijedi oblikovanje i proračuni vitla i konzole te mehanizma za okretanje granika. Za prikaz konstrukcijskog rješenja izrađen je 3D model i tehnička dokumentacija koja je priložena u završetku rada. Za navedeno je korišten programski paket SolidWorks 2017.The assignment of this final thesis was the design of a jib crane while taking into consideration the given requirements. The load capacity of the crane is 0,5 t, the radius of the crane is 3 m, while the height of the room is 4 m. Also, requirements of lifting speed of 10 m/min, winch speed of 15 m/min and rotational speed of the crane of 2 rpm must be met. Since the crane's intended use is in a logistics centre warehouse, additionally to the given parameters it was preferable that the space on the ground remained free. Therefore, the name of this thesis is ceiling jib crane. Introduction analyses the principles of existing design solutions and two conceptual solutions are offered of which one was selected as the optimal solution. After the introduction follows the calculation of the lifting mechanism in accordance with the current European standards for transportation devices, then follows the shaping and calculation of the winch and cantilever as well as the mechanism for rotating the crane. For displaying the design solution, a 3D model was produced along with the technical documentation which is attached at the end of the thesis. The stated was done in SolidWorks 2017 software package

Master of Science

thesisThe drywall trade is the 4th most hazardous in the construction industry, with a worker injury rate 4 times that of the industry average. On a daily basis, workers are exposed to slips, falls, and falling objects, in addition to the large and awkward loads they must carry. Drywall sheets can weigh more than 100 lb and be catastrophic to the health of the installer's shoulders and lower back. For this study, an unpowered lift assist device was developed to carry the load of a drywall sheet during the installation process. The device takes the form of a polar robot similar to a camera jib and allows the installer to move sheets effortlessly through the workspace. Initial calculations indicated a nearly 63% reduced weight in the user's hands. A testing regimen was developed to simulate a drywall installer's most hazardous lifting motions. These lifting motions were repeated both with and without the device for comparison. During these lifting motions, test subjects were fitted with electromyography (EMG) sensors on four lumbar muscles to measure muscle activation. Mean, peak, and effort data for the lifting exercises were extracted and compared to the unassisted lift. Test data revealed overall muscle activation across all four muscle groups on both lifting motions was reduced by 69%. These data support the effectiveness of the device and warrant future development of such a device

Sixteenth-century Spanish Cranes and Lázaro de Velasco's Translation of Vitruvius

Quite a number of studies, such as those by Íñiguez (1963, pp. 193-211), García Tapia (1990, pp. 172-181) and Lorda (1997), have discussed the cranes used in the construction of Spanish Renaissance buildings. All these papers deal with the surviving evidence about the construction of the Escorial complex, in particular the main church or basilica, such as a large number of contracts and other documents, a manuscript by Juan de Herrera called Architectura y machinas, and the outstanding drawing of the Escorial building site now at Hatfield House, England. Another source for studies about Spanish Renaissance cranes is Lázaro de Velasco’s translation of Vitruvius’ De architectura libri decem. Velasco was the grandchild of a wood carver, Juan López de Velasco, and the son of Jacopo Torni, a Florentine painter and sculptor who was master mason of Murcia cathedral and architect of the church of San Jerónimo in Granada. Velasco followed an ecclesiastical career, holding a post as beneficiado in the chapter of Granada cathedral. However, his artistic interests show up in his work as illuminator of choir books, in his ill-fated attempt to obtain the office of master mason for Granada Cathedral in 1577 and in his complete translation of Vitruvius into Spanish, about 1564. Of course, Velasco translates the passages of Vitruvius’ tenth book about machines, such as the tryspast and the polyspast, adding drawings of these hoisting devices. Furthermore, Velasco interpolates a long passage describing a big crane, similar but not identical to the ones in the Escorial, with a pyramidal frame, a windlass or mástil, moved by men treading inside a wheel, a rotating pole, ropes and a tryspast, but does not furnish a drawing of this big, non-Vitruvian crane. After a brief review of Velasco’s career, I shall try to reconstruct the big crane in Lázaro de Velasco’s text, comparing it with the Escorial cranes, as depicted in the Hatfield drawing and described in the studies of Íñiguez, García Tapia and Lorda. I shall also discuss the possible sources of Lázaro de Velasco expertise on cranes; on the one hand, classical sources such as Vitruvius or Greek mechanics, on the other, the traditional and empirical lore of carpenters and masons, embodied in the ingenio or crane put up in Murcia cathedral in the years of Jacopo Torni, or the cranes that Velasco may have seen in Granada cathedral

Hester Gardens - A LifeMoves Temporary Interim-Housing Facility

LifeMoves, an organization that provides interim housing and supportive services to families and individuals experiencing homelessness, recently purchased 0.35 acres of land, located at 1759 Hester Avenue, San Jose, CA 95128. LifeMoves has challenged the design team to provide preliminary building layouts, a structural alternative analysis, construction management plans, and general civil plans for a multi-story, family-friendly, interim housing facility, which has been named Hester Gardens. The design team considered both steel, a traditional building material, and shipping containers, a sustainable alternative building material, for this project. Each alternative included a structural design and analysis, as well as a cost estimate and construction schedule. A conceptual plan, site and building layout, utility plan, necessary mock permits, and a recommended alternative plan was drawn for LifeMoves. The finished design documents, models, and printed plan drawings were turned over to LifeMoves

Research Vessel POSEIDON

The research vessel POSEIDON, operated by GEOMAR Kiel, is an important research platform for the marine science community. The knowledge gained from ocean expeditions contributes to a better understanding of the biological, physical, geological and chemical processes in the ocean

Bannan Engineering Laboratories Redesign

Due to the growing student body within Santa Clara University\u27s School of Engineering, an increase in classrooms, laboratories, offices, and study spaces is needed to for student engineering resources. The objective of the Bannan Engineering Laboratories Redesign is to provide a preliminary structural design and corresponding construction management schedule and budget as an alternative to the existing single-story Bannan Engineering Laboratories building. The proposed design consists of three floors of versatile spaces: one basement and two stories above ground. The 160-ft by 68-ft building features eleven hybrid classroom/laboratories in the basement, seven standard classrooms on the first floor, fourteen faculty offices on the second floor, five open collaboration/study areas throughout the building, and an open outdoor patio. This resulted in over 32,000 square feet of versatile space, designed to be convertible for classroom, laboratory, or general office use, a 300% increase in comparison to the current Bannan Engineering Laboratories building. The preliminary structural design consists of analysis and design calculations and for the structure\u27s steel beams, girders, and columns, and the seismic design of special concentric braced frames. To insure construction feasibility, the project scope also includes an introductory construction schedule and a building cost estimate. The projected cost is $1.1 million for the structural steel and structural concrete, with an expected estimated time frame of 15 months

Development of An Experimental Gantry Crane Rig

A project has been conducted on the development of a gantry crane experimental rig. The project focused on the analysis on the structural, rigidity and stability of the rig. The aim of the analysis is to determine whether the element or collection of elements, can safety withstand the specified forces. The challenge of this project is to find the best structural design of the gantry crane rig by computer simulation using ANSYS, and by conducting stress and deformation analysis. The design also will be considered material selection, which is the outcome of material selection is the selection of most suitable material to be used for the gantry crane structure