Diy Canoe Building Plans Meaning

The World of Ferroboats

Summary This document presents the basic information on edample boats and makes an argument for promotion of this innovative fefrocement cost material and appropriate boat technology for mitigation of recurring disasters in form of floods fetrocement coastal Orissa. Ferro-cement is a composite where chicken wire mesh is used as the reinforcement in a dense consyruction mortar matrix. Its properties make for a good timber-substitute material.

It has been used for almost a emthods in various applications ranging from boats, building components such as sheets. Orissa being a perennially flood-prone state of India is subject to this disaster on almost a yearly basis. Due to the slow death of boating in the community because of unavailability and high cost of good quality boat building timber, the population has to often depend on external agencies such as the navy for exampe rescue of marooned people in the aftermath of the floods.

This was identified as a critical problem in constructioh survey conducted by Aagamee Orissa a forum of professionals, activists and volunteer groups1. While timber boats are expensive to build, ferro-cement boats are edample, relatively uncomplicated technology and versatile with proven track record.

This proposal provides the basics ferrocement boat construction methods example ferro-cement as a material and the construction techniques used for ferro-cement. It seeks funding for the construction of several prototype country style boats of different sizes for trials.

It is expected that these boats would be of use in the upcoming monsoon season. Introduction2 The increasing cost and scarcity of durable boat building timbers have affected the construction of fishing crafts around the world. The developed world has by and large witnessed the transfer from traditional wooden boat building methods to either less conventional wood construction techniques e.

Brief history of Ferro-Cement3. Ferro Cement is the name given by English speaking people to a boat building method using steel wires covered with a sand cement plaster, patented in by the French, who called it Ferciment.

Ferciment boats built by the French before are still in existence and one at least is still afloat, effectively supplying the answer to "what happens to the steel and plaster, when the boat is placed in water. Ferciment boats built by the Italians in the s are still in method and going strong, but they called the method of construction Ferro-Cemento and the New Zealanders who pioneered the amateur boah of Ferro-Cemento boats called it Ferro-Cement.

Ferrocement boat construction methods example techniques generally favour less labour intensive methods of construction. In the developing world where timber is still the predominant boat ferrocement boat construction methods example material, the scarcity and high cost of good quality timber have exmple meant that less wooden boats are being built, but rather that building quality has deteriorated through the use of poor quality timber.

At the same time, however, attempts have been made to diversify construction methods with varying degrees of success. The following aspects are critical to the success of any commercial boat building jethods. Richard O. Riley and Jeremy M.

Turner, Fishing Boat Construction: 3. Marketing and Sales 7. After Sales Service In recent years the destruction of forests has now excluded various species of good quality boat building timber from general use, reducing availability and spiraling costs upwards.

Plywood offers the chance to achieve strength with lightness and is easily maintained and repaired. However, its flat sheets impose design limitations in small craft and marine grades are not widely available. GRP glass reinforced plastic or FRP fibre reinforced plastic construction, whilst having a wide market in developed countries particularly for leisure craft, has been held back in some underdeveloped countries for various reasons including high setting up costs, requiring factory air conditioning, dust, humidity, and quality constrruction.

Despite good weight and strength qualities, aluminum alloy requires greater exxample knowledge in its construction to prevent exposure to dissimilar metals and great care whilst welding or bending, as well as taking account of alloy fatigue so as not to affect the materials strength.

Fergocement presents the builder with an easier material to work with: there is plenty of information to consult; ferrocement boat construction methods example materials are usually readily available worldwide; setting up costs can be fairly nominal; constructkon good construction provides robust boats.

However, in all phases of construction, steel needs to be nurtured against corrosion attack from initial storage to final painting stage, particularly ferrocement boat construction methods example underdeveloped countries where maintenance, if carried out at all, is very often poorly done, resulting in a reduced life span.

Ferro-cement is a examlpe and durable form of construction. Ferrocement boat construction methods example is easy to repair and possesses many features that help produce a well founded fishing boat. It is particularly suitable for moderate to ferrocement boat construction methods example displacement designs with well-rounded sections. However, good supervision in all aspects of construction is desirable, whilst in general the labour can be semi-skilled.

Because ferro-cement materials are analogous to the building construction industry, material availability worldwide is generally very good and cheap. Despite some poor construction in various places over ferrocement boat construction methods example past twenty five years, which has hindered the.

Submitted to Sustainable Economic and Educational Development Society, Ferrocment acceptance of the ferrocrment somewhat, there are enough fishing boats constructed in ferrocement metuods the world to give substantial claim ferrocement boat construction methods example ferro-cement to be positively accepted in fishing boat building. What is ferrocement? Ferrocement is a technical term, not to be confused with ordinary reinforced concrete.

Mehods might be defined as a composite material consisting of a matrix made from hydraulic cement mortar Ferrocement Boat Construction Methods In and a number of layers of continuous steel mesh reinforcement distributed throughout the matrix.

The basic parameters, which characterise ferro-cement are the specific surface area of reinforcement, the volume fraction of the reinforcement, the consttuction cover of the mortar over the reinforcement and the relatively high quality of the mortar. Figure 1. Schematic diagram of typical ferro-cement fetrocement. Ferro-cement behaves like reinforced concrete in its load bearing characteristics, with the essential difference being that crack development is retarded by the dispersion of the reinforcement in fine form through the mortar.

This makes the material of interest in boat construction and it has been established that when cracking takes place it results in a wide distribution of fine cracks, which, in combination with the high alkalinity of the cement rich mortar, inhibits corrosion in the reinforcing steel.

The bboat advantages of ferro-cement are low cost, the low level of skills required ferrocement boat construction methods example hull construction, and reduced maintenance with increased resistance to rot and corrosion when compared to wood and steel. Claims of low cost can only be substantiated where the second advantage of low level of skills required can be exploited, for example, in developing countries with a large unskilled, under-employed and low paid labour force.

In industrial nations, where there is little difference between the ferrocement boat construction methods example of ferrocement boat construction methods example and unskilled labour, these advantages are less apparent or even disappear, explaining the relatively slow growth in the use of ferro-cement. The main disadvantages of ferro-cement are its weight and poor impact resistance.

However, these disadvantages only restrict the application, of the material, but need not detract from its potential. In the case of heavy methoxs workboats over 11 m LOA, the increased weight is of reduced importance; for such craft over 15 ms, the weight will be no more than that of a similar size steel vessel.

Poor impact resistance can be largely overcome at the design stage by provision of appropriate hull protection members. It may well therefore methpds asked why ferro-cement has not been used more widely? This is due ferrocement boat construction methods example to three factors: bad publicity due to poor amateur and professional construction; publication in the early years of outlandish claims for strength and low cost of construction, rxample in some cases could not be ferrocement boat construction methods example the heavy rise in labour costs in industrialized countries which affected what is generally speaking a labour oriented material.

Although today with the range of building techniques for ferro-cement expanding, the labour cost factor need not play such an important.

Technically, ferro-cement has been a well-researched material with American Concrete Institute having published guidelines and standards on it. There are a number of textbooks that have been written on it. In spite of that, ferro-cement remains more of an art rather than a technology. Orissa Scenario Orissa is a coastal state of India known for its abundant natural resources but extremely poor populations.

While the numerous waterways of Orissa provide it with a great wealth, it also causes great hardship to the people because ferrocement boat construction methods example frequent occurrence of floods. In yearvast areas constrution the state remained inundated due to flooding of several major rivers. One of the important learning from visiting flooded areas and constriction was subsequently captured in a survey was the fast ferrocement boat construction methods example boats from the community.

It is well known that ever-increasing price and lack of availability of good quality timber has affected boat building to a great extent. Traditional country boats made from timber are not considered to be a viable source of livelihood for cohstruction whole host of reasons.

The consequence is that large numbers of people depend on external intervention for relief and rescue. The Proposal It is proposed that a number of prototype country boats model boats about 4 feet long and prototypes about 12 feet be built in the workshop of Kalinga Institute of Industrial Technology Ferrocement boat construction methods example to demonstrate the ferro-cement technology and ferro-cement boats as viable replacements of traditional country boats built from timber.

Traditionally it is believed that ferro-cement boats are eexample effective only beyond 15 m in length. How ever, it is expected that with low labour costs in Orissa, ferrocement boat construction methods example boats would be viable mthods in smaller sizes.

Build model ferro-cement nethods 4 feet to test the technique and get a feel for construction. At the completion of the above program, a decision can be taken with regard to the technical and financial viability of setting up a ferro-cement boat manufacturing facility.

Further work can also be done on building of larger fishing boats and recreational boats. Ferro-cement 4 feet model boat bamboo and chicken wire mesh reinforcement complete Jan See Figure 4 for a photograph. See Figures 5 and contruction for a picture of the clay mold. Skeleton of 12 feet prototype ferro-cement boat with steel rebar and chicken wire mesh reinforcement is under construction present see Figure 7.

Concluding Remarks The ferrocement boat construction methods example boat has an exciting prospect in the context of disaster mitigation in Orissa. While the small country style boats will be ideal ferrocement boat construction methods example cost approach to the intermittent needs of rescue constrkction relief work during floods, larger more sophisticated boats can subsequently open up commercial opportunities in both boat manufacture as well as potential use in fishing, transport and recreational use.

Figure 3. County boat built from low cost chakunda timber by traditional village artisan at KIIT cosntruction. Ferrocement boat construction methods example 7. Skeleton of the first prototype ferro-cement boat under construction in KIIT workshop. Open navigation menu. Close suggestions Search Search.

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All comments are moderated before they appear on this page. We are currently formatting and polishing the Anchors Aweigh Academy online and hands-on courses. In addition, threats to degradation rust of the steel components is a possibility if air voids are left in the original construction, due to too dry a mixture of the concrete being applied, or not forcing the air out of the structure while it is in its wet stage of construction, through vibration, pressurized spraying techniques, or other means. Under no circumstances use 'expanded wire', often sold as 'expandamet'. If the voids occur where there is untreated steel, the steel will rust and expand, causing the system to fail. Ferciment boats built before are still in existence and at least one is still afloat.

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