The goal of the beam project is to design and construct a beam that can hold a given amount of weight without breaking. The beam is required to hold a concentrated load of 375 lbf on the X-axis and 150 lbf on the Y-axis. The maximum allowable weight of the beam is 250 grams. The maximum allowable deflection for the beam is 0.230 in. and 0.200 in. for the X and Y-axis respectively. The beam is required to be 24 in. in length, and it will be tested on a simply supported configuration spanning 21 in. All calculations are to be done under the assumption that the density of basswood is 28 lbm/ft3 and the modulus of elasticity for basswood is 1.46x106 lbm/in2. Given the constraints of a spending cost of $10.50, a maximum beam weight of 250 grams,
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.
Arielle: (show drawing) In the end we had made a beam bridge out of hot glue, cardboard and popsicle sticks. We used the cardboard because it is a flat surface and is very light. However, cardboard is not strong enough on it’s own. We then decided to use hot glue to attach the popsicle sticks to the
Several students are doing Science Fair projects at Woodstock Middle School and I am one of the seventh grade students. The topic I shall be doing is on how bridge structure affects the weight bearing capacity. I chose this specific topic to guide bridge builders in the right direction on what bridge is safest for public use. The key topics I plan to research on include the following: Beam, Warren Truss, suspension, cable-stayed, and arch bridges. I shall use the scientific method to guide me through this process.
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
In order to create a column-free space, designers and engineers opted to use free spanning composite glue-laminated (glulam) wood-steel arches supported by inclined concrete buttresses (Chodikoff, 2009). For the arches, the glulam slabs were made from engineered timbers consisting of wood laminations bonded together with strong, waterproof adhesives, resulting in a structural component as strong as steel. To increase the lateral stiffness, and assist in carrying the bending stresses from unbalanced snow loading, each arch has steel components anchoring the glulam slabs – resulting in a composite glulam wood-steel arch (Gregory, 2010). The use of glulam for the arches allowed for the roof’s large 100-metre span and curved element to be produced (Dietsch, 2011).
In order to survive an apocalypse, there are many things that are most certainly needed. To survive, you will most certainly need the help of others. You want the others you are with to be able to help you in any way possible. If you can obtain help from someone that is intelligent and useful, then that is even better. Another things that is most definitely needed to survive, would be chemicals if they can be obtained. These chemicals can be able to provide you with things that would not be easily found during an apocalypse. These things found in the chemicals could be essential to your body and its proper functioning. Another thing that is most certainly needed during an apocalypse that might not be easily found are a great amount
The purpose of this report is to introduce the roof truss that I had designed for the project of design studio 1 which is personal space. I have included the following content for the design: characteristics, cons and pros, sketch and label, and cross section of the design. The roof truss that I had design for the personal space building is king post truss (also known as crown post truss). According to online dictionary, the definition of king post is a structural member running vertically between the apex and base of triangular roof
In the initial stages of it’s evolution, the truss took the form of a king post, a simple triangular shape, usually composed of timber with iron hardware, divided by a single vertical post connecting top and bottom chords. You can make
During the construction, two half-spans being assembled 50 meters above ground level had a misalignment of 4.5 inches or 114mm in camber. It was suggested by John Holland & Constructions to use a kentledge to weigh down the higher section of bridge. It so happened that they had ten, eight tonne concrete blocks on site. These were placed halfway along the higher span to
Superstructure bears the load that is being passed over the bridge and it transmits the forces caused by the same to substructure. Load received from the decking is transferred on to the substructure by Bearings. They also distribute the load evenly over the substructure material as it may not have sufficient strength to bear the superstructure load directly. Piers and Abutments are the vertical substructures which transfer the load to the earth in the foundation. Wing walls and returns are constructed as the extension of
Purpose: The purpose of this Physics Lab is to investigate what factors determine the amount of flexion of the cantilever. Hence, the objective is to establish a relationship between the length of a cantilever, which may give some insight into the physics of cantilevers.
The fresh rooftop cantilevers in total 42.5 m, but only the 10.5m back span and about 19m of the cantilever can be erected during the football season. This share of the roof was erected in modules containing a rafter, the backup mast, the 14m-long back stay and the linking inner forestay. The top of the mast is 12m overhead the new rooftop level and 37m overhead ground level. It is formed with 457mm diameter CHS sections, while the linking forestays and backstays are all 406mm diameter CHS sections.