Universal Testing & Research Center (Division of Sustainable Stewardship Private Limited), an ISO 17025:2017 certified Laboratory approved by BIS, NABL and QAI. We are provide complete solution of the testing requirement of wood industries .IS 4990 is an Indian Standard (IS) specification related to plywood used for formwork or shuttering in construction. Shuttering plywood is designed specifically for use in concrete formwork to create molds for casting concrete structures. Here are some key aspects related to IS 4990:

Tests for shuttering plywood:

• Raw Materials: The standard specifies the type of wood or wood-based materials that can be used in the production of shuttering plywood.
• Adhesive Quality: The adhesive used in the plywood should have a certain level of resistance to water and should ensure good bonding between the veneers.
• Dimensions: IS 4990 outlines the permissible variations in thickness, length, and width of the shuttering plywood sheets.
• Moisture Content: The standard may specify the acceptable moisture content of the plywood to ensure stability and performance in construction applications.
• Bending Strength: Shuttering plywood needs to meet specific requirements for bending strength to withstand the pressures exerted during the concrete casting process.
• Glue Shear Strength: The standard may include tests to assess the shear strength of the glue used in the plywood, ensuring it can withstand the stresses encountered in formwork applications.
• Boil Test: This test may be included to evaluate the plywood's resistance to delamination when exposed to boiling water.
• Preservative Treatment: If specified, the standard may provide guidelines for the preservative treatment of the plywood to enhance its durability, especially if it's expected to be reused.

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