We are not familiar with the problem you describe. It should be possible to sand Tas oak (even 'aggressively') without causing colour change. Tas oak normally varies in colour from straw, to pink, to reddish brown as illustrated here https://thetimberline.com.au/pages/tasmanian-oak. The timber in your image looks very dark so perhaps sanding it has generated enough heat to darken the wood. We can't suggest a remedy, other than turning the treads over, so the darkened wood is on the underside. Sorry we can't be more help.
I would like to make a replica for free, of an aircraft (a flying machine), on a big/large scale, for a charitable, formal-educational purpose, together with some children and students. Later it will be exhibited in the open air in South East Europe. Can you help on a voluntary basis, with a donation/sponsorship, consisting of cutting some pieces/parts of birch plywood/ash solid wood? And you will also be mentioned as a public sponsor of this noble project. I have the digital drawings of these parts/pieces, designed for free by a designer from outside the country. Thank you very much. +40742269120 - phone/Whatsapp P.S.: A sponsor from UK already cut for FREE, on FREE OF CHARGE basis, the first 3 frames of the aircraft. First 3 out of a total of 12.
Unfortunately WoodSolutions Australia is not able to help you with this very worthy project. Our role is to provide advice about wood products. We do not trade in timber or plywood.
We have a junction detail where a new, non load bearing timber framed stud wall with fire rated system cladding(-/90/90), is to sit on top of the existing double brick wall and extend to the underside of the roof to create a bounding wall. Where this junction meets the two elements with the same fire rating (brick and timber), can you direct me in the way of the correct detail?
We only have a limited number of certified construction details, and these form the basis of our Technical Design Guides. For reasons of legal liability we limit our advice to these details, rather than becoming involved in specific projects. We suggest you consult a Building Certifier or fire engineer, who will be able to give you formal building approval. Contact details for fire engineers can be found on various websites.
