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See our Online Store for additional publications on aluminum construction. Please see our Online Store for all the Glen-L designs available for aluminum construction. The following can be used as a general guideline for selecting materials. However, the listing is not necessarily all encompassing nor given in order of preference. To figure hull cost, Alu Boat Building use weight of hull buildint cost per pound.

For further information on welding, see WeldingTipsandTricks. The number alu boat building Alu Boat Building people with aluminum welding skills and access to fabricating equipment has increased considerably over the years.

Yet many are Alu Boat Building unaware of fundamental considerations confronting alu boat building short-handed amateur building a single boat for his own account. The would-be do-it-yourself aluminum boatbuilder already familiar with aluminum often has his roots in a buildiing production fabrication setting. Buildjng there may Alu Boat Building be a tendency to want to apply mass-production techniques to the construction of just a single boat.

But building a single boat yourself is considerably different from one built on a production line, and thus may require certain adjustments alu boat building even a revised mind set on the builing of the builder.

First, there is no one, superior Alu Boat Building way to build an aluminum boat. In fact, there can be alu boat building suitable approaches and variations. Consider Alu Boat Building the following. Because production builders are always thinking up ways to buildingg labor and material costs, and time required to Alu Boat Building build boats, they evolve specialized methods and materials that help toward these ends even if there is not necessarily aly improvement in the boat.

For example, they may use special proprietary extrusions to expedite some assembly process such alu Alu Boat Building boat building joining side and bottom plating at the alu boat building see Fig. Alternately, your chines might then be backed with a simple round bar Fig. None alu boat building these methods is necessarily superior, but just different due to circumstances.

Also, production builders often make up sophisticated re-usable production jigs over which pre-cut hull panels are alu Alu Boat Building boat building and welded. These jigs may also rotate to facilitate high-speed welding, with internal members added after the hull is removed bui,ding the jig.

In alu boat building case, end results are much the same and with Alu Boat Building comparable boat quality. Using a frame substructure for setting up your hull has several advantages for the do-it-yourselfer typically working. First the frame substructure makes it easy to assure hull accuracy alu boat building is so important to ultimate performance Alu Boat Building in a powerboat.

Factory production boatbuilders often use specialized forming equipment not always available to amateurs, or use forming services that might be provided by metal suppliers when quantity requirements are high. Conversely, a design for the do-it-yourself builder Alu Boat Building would more likely specify internal longitudinal stiffeners i. Either method gets the job done but the latter is easier and cheaper for most building their own boats.

First, a disclaimer. But in reality few do-it-yourselfers want to pay the Alu Boat Building Alu Boat Building price for the service. But alu boat building is considerably heavier than aluminum, so boats alu boat building for boaf are usually designed for greater displacement. The consequences for a semi- or full-planing powerboat might be so much the better since the lighter aluminum boat will need less power and fuel. But in converting slower displacement-type powerboats from steel Alu Boat Building to aluminum, you might need to add ballast into such a boat done in aluminum to bring it back down Building Alu Boat to its original lines.

This may place the center of gravity too far below buildinf of its steel brethren and result a snappy, jerky motion. So instead, you may want to place some of the added weight higher up. Aluminum Alu Boat Building is not as strong as steel so some compensations must be made if using it in place of steel.

Without getting too technical, with aluminum used for shell plating e. Put another way, to get the same strength Alu Boat Building as steel in alu boat building aluminum hull, alu boat building needs to be approximately alu boat building the weight of steel. More important is how the two perform under repeated fatigue loading alu boat building cycles alternating between tension Alu Boat Building and compression.

Tests show that for alu boat building similar number of cycles, steel stays above its yield strength threshold. In other words, it is more likely to fail due to fatigue over time, an important consideration for boats Alu Boat Building subject to such conditions i.

But by how much? Converting from steel to aluminum is fairly straight-forward mainly because the Boat Building Alu members used are much the same in configuration and the methods of design and construction are similar. And while Alu Boat Building there are standards-making organizations e.

Consider plating thickness. On the steel boat, this is more often based on the practical minimum necessary to allu off corrosion over time, provide decent welds, and a thickness adequate to minimize unsightly deformation.Alu Boat Building Alu Boat Building

Thus 10GA. And in most cases this increase applies mostly to thickness alone as is listed in Fig. An operating premise is that steel boats in the size range discussed are almost always stronger than is necessary; this due to Alu Boat Building the nature of the material, for reasons previously noted, and the fact that the shape of most boats adds strength in and of itself, and often where it does the most good such as in the bow.

So using the example, 10GA. In other words, multiply the thickness of the steel member by a factor of from 1. Tip: Start with 1. The point is, many alternatives can be used to build an aluminum alu boat building with Alu Boat Building largely the same results in terms of strength, durability.

In the above and referring to Fig. First, the extra strength Alu Boat Building that a shaped member would provide in the steel boat is simply redundant in the size boats discussed; it would Alu Boat Building Alu Boat Building Alu Boat Building just add weight, cost, and complexity. Second, shaped members add to the difficulties of inspection, maintenance, and corrosion protection Alu Boat Building in the steel boat; for example, the ability to see buuilding coat the underside flanges is difficult, especially when such members are small.

However, in the aluminum boat in Fig. But there are several reasons for using shaped members, especially Alu Boat Building Alu Boat Building Alu Boat Building Alu Boat Building for longitudinal stiffeners. First, alu boat building members alu boat building stronger.

Or put another way, you could have Alu Boat Building the same strength in a lower-profiled shape than with flat bar. And the added strength in the aluminum boat is Alu Boat Building vuilding plus. Another benefit might be more usable interior volume. They tend not to be so floppy, and bend more uniformly than flat bar. The downside is that extrusions cost more than flat bar or the sheet stock one can use to make flat bars, and may not be readily available at least in the size you want.

If Alu Boat Building working from stock plans for an aluminum boat, the designer probably specified certain sizes, types, and alloys of members Alu Boat Building Alu Boat Building for framing. But deviations may be possible. Most designs have some latitude in alternates that can be substituted.

Channels can be made alu boat building split square or rectangular tubing, or even split pipe if somewhat larger than the specified Alu Boat Building Alu Boat Building channel. You could even fabricate your own sectional shapes from built-up flat bar.

Then too, if members are not available in one size, perhaps one the next size up will alu boat building. However, you should always consider the consequences of added weight that such a change might make.

Conversely, alu boat building is probably better to avoid downsizing to a smaller member as the opposite alternative. To the novice, there is a bewildering array of aluminum alloys available.

But for the welded aluminum alu boat building, the choices narrow down to the so-called marine alloys in the and series, the latter typically being extrusions. Yet even within these series there are still many alternatives. But Alu Boat BuildingAlu Boat Building ng> the most common, readily available, and suitable for welded boat hulls include: H32 H34 H H32 H H However, alu boat building designer may have already taken this into consideration if is specified.

Corrosion resistance for the alloys listed Alu Boat Building Alu Boat Building above is excellent in all cases. The material has good corrosion resistance also and is commonly used for extruded Alu Boat Building shapes.

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