Truss Design Project Essay -- Engineering

abridgmentWe have designed a truss to alimentation a lay load, placed at 190mm from the edge of a 450mm gap. The vertical face of the trusses is modelled on the already open up K truss design, but the overall chassis of the structure is our own. There are three K units on severally truss. The two vertical faces are held together at the top by another truss-like design. We modelled this on the N truss.The truss is constructed from hot-dog sticks, glue and bolts.IntroductionThe working class was to construct a truss out of 48 hot-dog sticks and 30 bolts to support as large a point load as possible. It was to queer a gap of 450mm and to support a load placed at 190mm from the end. The truss may have a maximum depth on a lower floor the supports of 130mm, and the loading rod placed not more than 110mm beneath the supports. ingredient ends must be bolted and the forces within the processs calculable.Project ObjectivesMaximise the load competency of the trussAchieve an even stat istical distribution of force to distributively memberConstruct the truss carefully for maximum qualityDesign a truss which did not fail from flexural-torsional buckling. Development of the ModelWe began by researching established truss designs, such as the Bailey bridge, Baltimore bridge and the N truss. We realised that although each type of truss was useful for its own purpose, none of the bridges was think for supporting a point load. However, we compared the designs by calculating the distribution of forces in the members. This gave some guidance to the development of the model.We researched the K truss, which is composed of many repeated K units, in either focal point. This design gives the about even distribution of force to the members, which satisfies o... ... to the members reinforcing material glued to compression members holes drilled towards the middle of focus members to give extra support the rounded shape of the top and basis of the trusses for improved weight distribution and the N truss design on the top and bottom to prevent flexural-torsional buckling.Drawings are over the pageConclusionsThe K-truss is the most effective means of distributing a point load amongst members, under classic conditions.Increasing the concavity/ angle of the outer members of the truss decreases the forces in the members.Reversing the direction of the Ks at the position of the point load helps to lessen the force in the corresponding vertical members.It is desirable to have as many Ks in the truss as possible. The dissolving agent is maximised so that all 30 bolts are used, giving a well-grounded amount of K joints.