Stramit Board

Target SDGs

Market Suggested Retail Price

$0.18

Target Users (Target Impact Group)

Household, Small and Medium-sized Enterprises

Distributors / Implementing Organizations

Straw Resource Limited and Roofers online

Regions

Worldwide

Manufacturing/Building Method

Strawboard's main component is straw. It is the same straw as the one used as roughage and bedding for cattle including any proportions of dry (typically less than 15 percent moist, by weight) stalks of the cereals (such as rice, wheat, rye, oats and barley), grasses, sugar cane bagasse. The straw is cleaned of foreign matter such as stones and clods of soil, as well as of fine particles and dust, and fed at a uniform rate and well-distributed manner into the ram of an extruder, where it is shaped. Compressed and baked, at a temperature of about 350- 400°F, continuously emerging as a billet of indeterminate length and a uniform thickness and width. 50, 75, and 100 mm are desirable thicknesses, and 1200 mm is a standard width. The emerging board is typically golden in color.

Intellectural Property Type

Patent

User Provision Model

Users can obtain Stramit boards by contacting the manufacturer's distribution office.

Distributions to Date Status

Unknown

Design Specifications

Stramit StrawBoard is manufactured from straw such as wheat or rice by a patented process of heat and pressure that fuses the straw using its internal resins, making it a completely natural product. Stramit is produced by continuous extrusion, has a tough, bonded external surface of recycled paper and is typically 35mm to 60mm thick.

Technical Support

Provided by the manufacturer

Replacement Components

Unknown

Lifecycle

Unknown

Manufacturer Specified Performance Parameters

Strength: Standard Stramit panels will accept 1100 kgs loading without deformation. Panels can be used for self-supporting partitions and external walls up to 3.5 m high without structural frames. They have ample strength for use as roof decking to support workmen. They are resistant to termites and other vermin.

Fire resistant: Stramit panels do not harbour enough oxygen to support combustion. Unlike other composite building panels, Stramit contains no added resins, alcohol, turps or other chemicals which produce flammable vapors. Skim-plastered the panels are UK certified for half an hour. Flame spread Class O.

Thermal insulation: Because of its composition Stramit panels have excellent thermal insulation properties in comparison with other structural walling materials. Standard 58mm panels have a thermal conductivity of not more than K=0.102 W/mk and a thermal resistance of R=0.5882 m²/kW.

Sound insulation: The thickness and density of Stramit panels reduce noise level from one side to the other by an average of 35 db.

Density: The standard panel is produced to a density of 380 kg/m^3. Stramit panels can be produced to a density varying from 150kg/m³ for heat insulation to 600kg/m³ for sound insulation.

Electrical conduits: Panels are normally produced with 22 mm diameter service holes at 300 mm centres to accept electrical wiring. Board can also be produced without electrical conduits. To fit electrical power outlets, a high speed router should be used for recessing and grooving.

Resistance to damage: Unlike gypsum board, Stramit panels can be handled like timber and be cut with a hand-held power saw or a hand saw with wide teeth setting. They are not easily damaged or broken in transit and can also be glued, nailed or drilled and will accept render, plaster, paint and wall paper.

Space saving: Compared with partitioning systems using brickwork, blockwork, studwork and gypsum board, Stramit panels can save considerable amounts of space.

Finish: Panels can be produced with both square or tapered edges. Standard panels are produced with recycled paper surface but specialist finishes can also be provided.

Vetted Performance Status

According to the manufacturer, the product meets the British Standard (BS 4046:1991) and is in Compliance with ISO 4046-4:2016 - Paper, board, pulps and related terms

Safety

Unconsolidated natural straw is notoriously combustible and a fire hazard, Stramit chars when subjected to torching, but does not support combustion and generally self-extinguishes upon withdrawal of the torch. However, the paper covering can be combustible and a means for spreading flame, so to meet noncombustible construction requirements, it may be necessary to use covering paper which has been treated with a suitable flame retardant or the like.

Complementary Technical Systems

None

Academic Research and References

Compliance with regulations

According to the manufacturer, the product meets the British Standard (BS 4046:1991) and is in Compliance with ISO 4046-4:2016 - Paper, board, pulps and related terms

Evaluation methods

Unknown

Other Information

Strawboard is not itself waterproof and must be suitably protected if it is to endure a moist environment

ISO 4046-4:2016 – Paper, board, pulps and related terms

“Contacts” Straw Resource, accessed on March 14, 2024, http://www.strawresource.com/contacts/

Patent