Plywood

Okoume, aucoumea klaineana, is a fast-growing, plantation-grown tropical hardwood. Okoume’s clear, beautifully-figured grain has a golden, honey-colored hue beneath epoxy and varnish, while its low density yields ultra-lightweight hulls. okoume marine grade plywood is manufactured in Europe’s finest mills to specs exceeding British Standard 1088 and Lloyd’s of London standards.  Plywood thickness in  millimetersapprox.inches  weight  lbs.  # of plies  Grade 2mm *(We use this for our …

4’ x 8’ Strong – Medium Density – Easy to Work – Hull Components – Floors – Bulkhead BS 1088 Hydrotek is a multi-ply marine plywood that is superior to all standard Meranti plywood currently produced.  Both face and inner plies are constructed from whole piece, color matched, Meranti veneers.  Hydrotek is used in boat building applications where only the …

Welley Timber Industries Sdn Bhd is a growing manufacturer of hardwood plywood and specifically professional in BS 1088 Marine Plywood and Flexible Plywood. Want to know more about us please visit our website at www.welleytimber.com

Principles to minimise potential problems with Class2 and Class 3 off form Surface FinishesPrinciple One: Most issues with off form surface finishes are associated with moisture.Wherever possible protect the formwork from weather. This includestarping where practical.Principle Two: The phenolic surface film used on formwork plywood is not impermeableto moisture. To ensure that moisture penetration is minimised, releaseagent and form oils …

Grain Raising or Surface SwellingGrain raising is caused by moisture penetrating the phenolic surface film and causingswelling of the surface veneer.The causes of grain raising are: Severe weather exposureFailure to use release agent or form oilDamage to the phenolic surface film i.e. misuse of vibrators, handling damageetc.Faulty phenolic surface filmAs mentioned previously, the purpose of the phenolic surface film is …

Staining in FormplyThe most common stains associated with formply are: Rust stainingTannin stainingPinking – free phenol from the phenolic surface film.In the writer’s experience, most staining is due to rust deposits on the deck at the time ofpouring or iron in the aggregate. These stains appear red/brown and are often mistakenfor tannin staining.Tannin staining is the result of extractives from …

Do not use any new panels showing bow or twist out of the pack. Wheredistortion exceeds 30mm, these panels fail the product standard. They shouldnot be used and returned to the manufacturer.Prevent/Minimise Exposure to MoistureWhere formply panels that have been supplied flat on site distort, there is onlyone cause, this is exposure to moisture, or a change in moisture content.6No …

Wrap and Twist in FormplyAS 6669 provides a 30mm flatness limitation for formply sheets. To measure flatness,formply sheets are placed concave down on a flat surface and any bow or twist exceeding30mm above the flat fails the product Standard.In addition, sheets must be able to be pushed flat using “palm pressure”, of approximately15kg.Formwork plywood supplied to the market with flatness …

This technical note has been developed in response to market problems and failuresrelating to the quality of off form finishes being achieved from formwork plywood in theAustralian market.Most issues relate to Class 2 surface finishes as defined in AS 3610, but issues do from timeto time occur in Class 3.This Technical Note discusses some common formwork plywood problems and lists …

Choosing your Plywood Formply is typically covered with an overlay paper to slow water absorption andcreate a smooth concrete surface; however, there are many different types ofplywood overlays and not all of them are suitable for use on formply. AS6669 hasstrict requirements for the quality of formply overlay to ensure it is water resistant,durable and will not adhere to the …