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Straw is an abundant agricultural waste product, and requires little energy to bale and transport for construction. For these reasons, straw bale construction is gaining popularity as part of passive solar and other renewable energy projects. [3] Wheat straw can be used as a fibrous filler combined with polymers to produce composite lumber. [4]
Straw-bale construction is a building method that uses bales of straw (usually wheat [2] straw) as structural elements, building insulation, or both. This construction method is commonly used in natural building or "brown" construction projects.
A Claas large round baler Baling hay. A baler or hay baler is a piece of farm machinery used to compress a cut and raked crop (such as hay, cotton, flax straw, salt marsh hay, or silage) into compact bales that are easy to handle, transport, and store.
The rice-straw bales (tawara (俵)) which form the ring are one third standard size and are partially buried in the clay of the dohyō. Four of the tawara are placed slightly outside the line of the circle at the four cardinal directions, these are called privileged bales (tokudawara). Originally, this was to allow rain to run off the surface ...
Tractor with a bale handling implement Tractor carrying bales. A bale handler is a generic term describing a piece of farm implement used to transport hay or straw bales. [1] They are often removable attachments for tractors, skidsteers, telehandlers, loaders, and even pickup trucks with special beds. [2] They come in many different styles and ...
[2] [3] In a strawbale house, a truth window is often used to show the walls are actually made from straw bales. A small section of a wall is left unplastered on the interior, and a frame is used to create a window which shows only straw, which makes up the inside of the wall. [4] Many designs exist for truth windows.
The use of highly compressed straw bales as insulation, though uncommon, is gaining popularity in experimental building projects for the high R-value and low cost of a thick wall made of straw. "Research by Joe McCabe at the Univ. of Arizona found R-value for both wheat and rice bales was about R-2.4 (RSI-0.42) per inch with the grain, and R-3 ...
Typically, bales created on farms with mobile machinery have been used ("field-bales"), but recently higher-density "recompressed" bales (or "straw-blocks") are increasing the loads that may be supported; where field bales might support around 600 pounds per linear foot of wall, the high density bales bear up to 4,000 lb./lin.ft.