hey friends my name is zee and you're watching here mr eazy and welcome to a new lesson for design technology timbers for the core content and today we have 1.12 which is timbers and by the end of the lesson you should be able to describe natural timbers for heartwoods 1.2.2 natural timbers soft wood 1.2.3 manufactured timbers and 1.5.4 which is properties which includes leaves so check out the pain comment in the comment section for all the time stamps and we'll move on with hot woods first and hot woods come from deciduous trees with broad leaves and hot wood trees take a long time to grow around 60 years this means that they are rarely planted and very expensive the majority of heart will grow in tropical regions such as amazonian climates while other others grow in temperate climates such as europe now growth rings are much smaller than soft woods making the greens closer oak beach birch ash are found in the european climate and oak right here into moderate brown color with unique and attractive green markings advantage is that it's tough and durable and it punishes well it's used for quality furniture and it has an attractive grain when well finished this advantage should be inexpensive it's becoming rarer and it's harder to work with than some wood and it corrodes iron and steel applications could be buildings houses boats and in the past but it's now used for high-end furniture mahogany has a dark reddish color and has a very close grain and it cuts and polishes easily and it's a very attractive finish and but this advantage should be expensive and oils on wood can give skin rash or breathing problems and applications could be high quality furniture windows and jewelry boxes then we have beach and balsa beach has a slight pink tint close grain and its tough durable heart is smooth to finish this advantage should be inexpensive and it's not resistant to moisture and it's not suitable for exterior therefore because of the moisture and applications creamy toys or laminated furniture or cooking implements biocycle balsa is pale and white space green due to it being a fast growing hard work and advantage should be it's very soft and easy to form and cut and it's relatively lightweight this fountain should be it's way too soft and weak for most products and applications could be model making or primary school projects then we have soft wood soft wood comes from coniferous trees with little light leaves that normally stay on during the winter just like christmas trees large is an exception as it loses its needle-like leaves during the winter soft woods naturally grow in colder regions such as alpine climates and softwood trees grow quickly so their growth rings are wider making the grain wider this ability to grow quickly means that the softwood trees can be used for timber after 20 to 30. so it's a typo 20 to 30 years making them cheaper than hardwood so pine is pale colored with aesthetically pleasing rain a fountain should be it's very durable and it's easy to work with and it's cheap as it grows quickly and this advantage should be including more crap or splinter more than some other wood applications could be housed constructions for roof joints and floorboards and as well as furniture doors fences and all this stuff over here cedar is lightweight pale color with even texture and advantage should be that the natural oils make it resistant to water and fungal growth and disadvantage is that it's more expensive than pine and it's not as strong as pine but applications will include outdoor furniture and fences and these boats over here then we have 1.2.3 manufactured timbers and manufacturing teams means that it's made from leftover wood such as sawdust and wood chippings and they can be made into large sheets rather than being restricted to the size of a tree trunk and they are used in low cost furniture plywood are a list of veneer glue at 90 degrees for the strength and the aesthetically pleasing outer layer and description is that a tree trunk is sliced into thin layers called veneer and these layers are glued together in 19 degrees which which is with the grain lines go in alternate directions to provide stability and advantages that is flat and structurally strong and it's and its surface looks like wood and it's resistant to warping cracking and twisting this advantage that is expensive and the edges look rough or sorry rough and water damage if the wrong grade is used and applications could be building and furniture that needs some strength mdf or medium density fiberboard is smooth light brown and can be veneered as it look as it doesn't look that good and they are basically the wood dust and fibers are mixed with glue and pressed into flat sheets under extreme heat and pressure advantages that is smooth great for painting and staining and it's easy to machine or work with this advantage should be it absorbs moisture and is not for outdoor use just like beach wood and it's weak compared to plywood for example applications could be cheap flat pack furniture wall panels and display cabinets then lastly i have 1.12 point for the properties of timbers hardness is ability of material to withstand cutting and scratching and timber is generally quite a soft material as it can be easily scratched and cut with metal tubes and oak is quite hard for a wood and the balsa is very soft forward or more specifically hardwood and this should not be confused with the classification of trees as hardwoods or soft woods and toughness is ability of material to withstand being a hit and the tough material can be quite soft but it might bend and deform when hit but not break and timber is quite a tough material if you hit it with a hammer it may dent but not break so it's a key concept to know here and durability is related material to last for a long time and timothy has been dried out and it's cap dry is durable because there's lots of moisture or water inside a non-dried out timber so the timber will easily erode it and oak beams in all buildings can be hundreds of years old however that the the wood that is left wet can rot quite quickly and then it won't be very durable some timbers contain natural oils that make them durable outside and timber can be treated with preservatives to make it more durable for outside use or any finishes and that's it for this 1.12 timbers content for the core content which is timbers and i hope you guys found it useful and helpful and if you did please leave a like and subscribe and comment down below if you have any questions or criticisms and also check out my instagram in the description for more daily content and i hope you guys have enjoyed this and i'll see you guys in the next video until then stay safe and peace