Make Trusses Essay

The purpose of the Boomilever Project is to build a cantilevered truss that is light-weight while still able to support 15 kilograms. With this project it serves to reinforce the cumulative concepts that have been taught throughout this semester of Engineering Statics. It has been necessary to research designs, types of wood, and types of adhesive that will create a final result that is consistent with the

A simple beam bridge that is flat across and supported at the two ends. A longer beam bridge can be held up along the middle by piers standing in the river. The weight of the bridge itself, plus the load that it carries, plus gravity are the downward forces are spread evenly across the length of the bridge. The upwards forces that hold the bridge up come from the piers. The Confederation Bridge in Canada is a famous beam bridge.

Initially, suspension bridges before 1940 were made of piers, towers, wires, anchorages, and roadways. Piers were the main foundation for the suspension bridges. There usually were two of them, which were made out of cement and were entrenched in ground underneath the body of water that the bridge was spanned across. Towers were built on top of the piers to provide a means of connection for the roadways and wires. Wires were connected to the towers, roadways, and anchorages to provide tension support for the weight of the bridge. The anchorages were large cement platforms that were planted into the ground on either side of the land so that the wires could be connected to it. Lastly, the roadways were the main point of the suspension bridge. They usually were wide enough to provide four lanes of traffic and stretched from one side of the bridge to the other. This was the basic design of the suspension bridges

We needed to fully utilise our knowledge by applying all the basic concepts in physics such as dynamic equilibrium and knowing the stiffness of the materials to build strong miniature bridge using given items to withstand the weight applied.

Each separate truss (of the dimensions 920x5x50mm) consisted of a Pratt truss with nine diagonal members on each side of the centre. The model was tested in sufficiently isolated condition by tutors. It successfully passed the initial weight test, and satisfactorily resisted horizontal forces. Once fitted onto the testing rig, loads were applied and increased incrementally. Slight deformation was observed before failing at 12.5 kg, at which force a collection of members failed in succession, concluding the test.

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Yarden: While creating our bridge our initial plans were much different than what our final product was. The more we worried about the strength of the bridge, the less time we had. We started off with the idea to have a truss bridge made of wood and cardboard. As shown here, (show picture from journal entry), but as the project progressed our ideas continued to change.

The Pratt truss bridge was originally founded by Caleb and Thomas Pratt in 1844. It is mainly used to carry trains. The biggest advantage of this bridge was its low costs for construction and the materials to construct a truss bridge are minimal. It also use materials that is cheaper and light in weight. We can easily identify a pratt truss by detecting its diagonal members, which (excluding for the very end ones) all slant down and in toward the center of the span. The pratt truss was designed by applying few laws that related to the mechanics of materials concept. The bridge is mainly built using steel girders to support the construction of the structure. The below part of bridge weight is high so, it need an enough support to prevent from

Our group created a Pratt bridge design in order to maximize our efficiency with the limited amount of resources we were given. We also chose this type of bridge because it was simple and allowed for us to complete it within the given time frame. Our bridge was constructed using ⅛” x ⅛” balsa wood sticks, string, cardboard, paper, and a lot of hot glue. The balsa wood was used to make the frame, the cardboard was used to act as a level plane for the cans to stand on and as reinforcement for the sides of the bridge, and the paper and string were both used to construct the remaining roadbed. Balsa wood was used for the frame because it acts as a sturdy foundation. Cardboard was used as a level place to set our cans because of how smooth, flat, and sturdy it is. Cardboard was also used and attached to the sides of our bridge, as well as some of the joints, because it is very sturdy and does not pull apart or flex easily. Lastly, we used string and paper for the

Referring to the Table 1 for comparison between the two design for bridge which are Cable Bridge and Truss Bridge, Truss Bridge is the better solution. We can see that the cost for building a truss bridge is less than cable bridge. The score for other economic in both bridge designs are equal. In environmental aspect, Truss Bridge have a better score compared to cable bridge. In social aspect, Cable bridge comes out to be better than Truss Bridge. By referring to the table, we can see that Truss Bridge have an average score on all other economic, environmental and social aspect. In my opinion, this is a better option than having one excellent and one worst score.

It is shaped in a way to transfer weight to the towers and anchors with its tension (O'Connor, 1971, p. 372). Cables are made of high strength wires spirally bound to form a rope (O'Connor, 1971, p. 372). Vertical cable suspenders that are fastened to the main cables hang the actual roadway. Stiffening girders and trusses are along the side of the bridge to distribute concentrated loads and help to keep the motion of the bridge at a minimum (Troitsky, 1994, p115).

The bridge of sighs is This lab use spaghetti with the bridge to see how many pennies it can hold.There are interesting facts about bridges ,I also stated its tie to our lab. Thousands of tourists have crowded onto and around San Francisco's Golden Gate Bridge to celebrate the iconic structure's 75th birthday.Crowds partied across its three-kilometer length, boats cruised on the water below and a finale of fireworks lit up the San Franciscan sky. It took four years to build, costing US$35 million and finally opened in 1937. It has remained one of the engineering world's most famous poster boys since. But it's not the only bridge that merits celebration.Here

Detail of Beam and Bowl Node Arched Girder Support of Steel Frame Top Ventilation One of the features of this structure that make it unique is that it isn’t just a singular dome, it is multiple intersecting domes that cover a larger area. These intersections must be reinforced in order for the structure to remain stable. A triangular truss girder connects the two intersecting domes, the longest one spans up to 100 m. These girders needed to bend with the arch of the dome, because of this the top and bottom chords of the girder are bent, the diagonals, which are thinner than the top and bottom, remain straight. These arched girders are hinged to concrete foundation blocks. The

Because of advancements in today’s technology in construction field, many types of bridges are being constructed depending on the requirement and their suitability for the situations.

The choice of a design concept for a bridge foundation is guided by various factors; several of these