Access to the Bendee Essay
The handiness of relevant local civilization. autochthonal patterns and cognition combined with new thoughts in engineering and scientific discipline can bring forth successful sustainable community development through invention. Autochthonal cognition will non merely lend to the success of intercession. but better still its sustainability into the hereafter. Numerous autochthonal communities worldwide have ever developed. operated and acted to different life challenges utilizing autochthonal methods passed on from one coevals to the following.
Our chief focal point in this paper will be to analyze and plan a simple span. foregrounding the usage of relevant traditional and autochthonal cognition and cultural heritage amongst the Aboriginal people and engineering to make a manner across the Nebine Creek. Introduction Access to the Bendee Downs site requires vehicles to traverse the Nebine Creek which remains unpassable during the wet seasons. The site is a 10 hr auto trip from Brisbane. the closest metropolis with a major airdrome. and can be accessed via the Murra Murra Road off the Balonne Highway or the Munda Munda Road and east via Fernlee Road.
Nebine River is about 20 metres broad. The span design would esteem the Nebine Creek’s cultural importance to the Kooma People ; it provides a topographic point where they can place with their fatherland and portion their civilization hence should be protected ( EWB Challenge. 2010 ) . The belongings has become a preservation icon for the part due to its preservation values. About 40km of the Nebine Creek flow through the belongingss and it has a 4km lasting waterhole behind the old homestead.
During the showery seasons. the wetlands render the river unpassable yet still it hosts a huge diverseness of birds and fauna hence rendering it regionally. nationally and internationally valuable ( EWB Challenge. 2010 ) . Our design had to borrow much from the autochthonal cognition of the local community in conserving the site to plan a technologically sound span. The following were considered in the design procedure: • The maximal burden it can back up at the center. • The maximal burden divided by the weight of the span ( a step of efficient usage of stuffs ) • Aesthetic entreaty of the concluding undertaking to give the preservation attempts a encouragement.
• The stuffs to be used. We settled on locally available stuffs like wood to do it low-cost and to do usage of autochthonal cognition. The design procedure was geared towards work outing the job of unpassable route by constructing a beam wooden span that would be capable to let even little vehicles to travel across. This was supposed to show a originative solution and affect teamwork in implementing the design. Background Information Indigenous cognition. sometimes referred to as ‘local knowledge’ . ‘traditional science’ or ‘folk knowledge’ is a signifier of cognition that is alone to a civilization or society.
It is passed from coevals to coevals by word of oral cavity and cultural rites and has been applied in about all signifiers of life including cooking. wellness attention. agribusiness. preservation. instruction and several other aspects of life that have sustained societies the universe over. The autochthonal manner of practical acquisition has been interrupted by the abstract signifier of formal and academic manner of larning witnessed soon ( Fien. 2010 ) . As the autochthonal cognition disappears. with it goes the valuable cognition about ways of life sustainably.
In order to carry through our aim of the design undertaking. first we sought to happen how the Aborigines lived and travelled in the yesteryear. This we did to assist us understand the local conditions and supply a productive context for our design to assist the community. Traditionally Aboriginal people carried every bit small as possible in their journeys and normally chose implements which were multi-purpose. They would revisit favorite campgrounds of old old ages where they had left that were excessively heavy to transport. These points would be left closer to H2O so that it wouldn’t demand to be carried far.
The adult females carried points on their caputs and would do a ring molded shock absorber of human hair. manguri. to have on when transporting heavy tonss such as a large wooden dish etc. Work force sometimes after runing would transport a kangaroo on their caputs. They carried their babes in a pouch in the dorsum of a possum tegument cloak ( Berowra Valley Regional Park. 2010 ) . This cognition was really of import in taking the best type of span. Types of Bridges Several types of Bridgess are in being today such as: Radio beam Bridges. Box Girder Bridges. Arch Bridges. Truss Bridges. Suspension Bridges. Cable Stayed Bridges.
Examples of these Bridgess are included in the appendix Beam Bridges A beam span is really simple. The farther apart its supports are. the weaker it becomes. Although the beam needs careful design. it is inexpensive and easy to fabricate but this compromises on its beauty. Box Girder Bridges This is similar to the beam span but with a girder. box shaped. which makes it stronger. The girder needs careful design ; it is inexpensive and easy to fabricate but non really beautiful. The public presentation of a beam span can be improved by utilizing supports i. e. arches. trusses. overseas telegrams. Arch Bridges
Bing one of the oldest types of span. they have great natural strength. Alternatively of forcing consecutive down. its weight is carried outward along the curve of the arch to the supports at each terminal. These supports or abutments carry the burden and maintain its terminals from distributing out. Although they are heavy. they are strong if good designed and can be really beautiful. Truss Bridges Truss Bridgess are largely empty infinite. but really effectual. They are made of thin triangulated assemblies of metal members. They have a really good strength to burden public presentation and can be incorporated into any design.
They are normally really beautiful. Suspension Bridges A suspension span as its name suggests. suspends the roadway from immense chief overseas telegrams widening from one terminal of the span to the other. All the extremely stressed parts of a suspension span are in tension apart from the towers. These overseas telegrams which rest on top of towers are secured at each terminal by anchorages. They have a high aesthetic value. are light and strong. They span greater distances. are expensive and are susceptible to coggle if designed improperly. Cable-Stayed Bridges The overseas telegrams are attached to the towers which bear the burden entirely.
They are really beautiful and necessitate less overseas telegram. They are easier and faster to construct but necessitate stronger towers. Core Material – The design procedure Design of an arch span. Initially. a suspension span and other options were considered but because of the flaxen nature of the topographic point and foundation restrictions. we decided on an arch span. We set to plan a lumber span over the Nebine Creek non merely capable of transporting walkers and animate beings but besides motor vehicles. This span would be built on concrete and rock abutments for the many girder span designed.
Alternatively of forcing consecutive down. the weight of the span ( chiefly made of laminated deal ) is carried outward along the curve of the arch to the supports at each terminal. These supports or abutments carry the burden and maintain its terminals from distributing out. The abutments should transport a span of 22 metres. Four braces of wooden beams. running lengthwise to the in relation to the span i. e. ‘longitudinal’ . will rest on hammerhead bearings. The wooden beams are made of wooden pieces put in beds and glued together to organize a larger beam.
The beds. which are glued laminated wooden beams to do them more lasting. are laid horizontally to organize the chief beam. Each brace measures 1 metre by 0. 5 metres. 15 centimeters thick. The span is 22 metres. The beams are to be made of deals like pine which are readily available in the community. To keep the pieces together steadfastly. metal brackets would be used to bolt the pieces together. On top of the stringers. little pieces of lumber would be laid across and a coating of asphalt paving would supply the route have oning surface.
Since the watercourse has high Bankss and can keep lifting Waterss caused by a brassy inundation during the rainy season. a concrete and rock arch span was chosen. The end was to keep the degree of the route to let for maximal possible watercourse flow. Traditionally. each household amongst the Aboriginal people would hold a canoe. made from a individual sheet of bark heated under low temperatures and so flex into form. These canoes were used for fishing and traversing rivers particularly during the showery seasons.
A base of clay built in the underside of the canoe. would be used to light fire to cook some of the fish caught from the river. The balance of the fish would be brought ashore to be shared amongst the remainder of the people. Traversing rivers. they would set logs across minor watercourses and sometimes big stones would be used ( Berowra Valley Regional Park. 2010 ) . Examples of these are shown in the appendix. A simple theoretical account would be made of wood to prove the serviceability of the span. A span program diagram was drawn to find the sum necessary ; this was done by following on the arch at the underside with a pencil.
On the theoretical account. an allowance of 10 inches is left from the terminal of the boards on the bottom cut to let plentifulness of support on the stringers to transport the weight of the span. The sum of arch on the theoretical account was determined by utilizing tack and twine to do the arch. Wood gum is used to attach the pieces together. the cut out pieces are attached to the top of the stringer with a bead of wood gum and little prison guards ( they are put on the bottom so that they do non demo. The pieces are so brought together to organize the theoretical account beam.