Assignment 2 (Timber Treatment & Seasoning)

TIMBER

Timber is wood in any of its stages from felling through readiness for use as structural material for construction, or wood pulp for paper production. (The distinction between the two terms is discussed below.)

Timber is supplied either rough or finished. Besides pulpwood, rough Timber is the raw material for furniture-making and other items requiring additional cutting and shaping. It is available in many species, usually hardwoods. Finished Timber is supplied in standard sizes, mostly for the construction industry, primarily softwood from coniferous species including pine, fir and kwila  but also some hardwood, for high-grade flooring.

TYPES OF TIMBER USED IN CONSTRUCTION

Types of timber for framing were once native timbers such as Rimu. The type mainly used for framing in NZ now is Radiata Pine.and also a small but significant number of Douglas fir and Macrocarpa is used.Their are also other types of timber available for interior finishing and flooring such as Radiata Pine, Rimu, Fijian Kauri, Oak and eucalypt species. Some imported timber can also be used externally like Kwila, Balau, Radiata Pine and Macrocarpa.

Fijian, Kauri, Radiata, Pine, Rimu, Douglas Fir

TIMBER TREATMENT

Timber treatment plays a critical part in the building industry, the atmosphere affects timber and also different insects that eat their way into wood. For timber framed buildings, huge numbers of timber used should be treated to protect it from insects and moisture. Timber treatment depends on the level of risk moisture has on it and where abouts its placed in the building frame. Timber may be treated with a preservative that protects it from being destroyed by insects, fungus or exposure to moisture. Generally this is applied through combined vacuum and pressure treatment. The preservatives used to pressure-treat timber are classified as pesticides. Due to potential hazards to humans and the environment, some are being phased out. Many newer preservatives are free of metallic compounds altogether, and are instead based on biodegradable organic chemistry. Treating timber provides long-term resistance to organisms that cause deterioration. If preservatives are applied correctly, they extend the productive life of timber by five to ten times. If left untreated, wood that is exposed to moisture or soil for sustained periods of time will become weakened by various types of fungi, bacteria or insects.

JOINTS

                                                           JOINT EXERCISE

Our first project for the year we were given a sheet with four diffrent joints that we had to cut out and make an replica off. We had to pick out a a timber at the length of 580mm and width 75mm. Scale of 1:25 and for the Dovetail Bevel were given 6mm down and 1mm in. I started off real good feeling confident about the exercise given to us. Along the way i had little hick-ups and bumps but overall i think i did an awsome job! So Randal(our tutor) says.

           Four Diffirent Types of Joints:

   

                1. Corner Halving

                2. Stopped the Halving 

                3. Single Dovetailed Halving

                4. Dovetailed Halving

Corner Halving                                                             

                                        Here we have some exsamples of the kind of joints we did.

                                We have the top one witch is call Corner Halving and at the

                                    bottom we have the dificault one of all the Dovetailed Halving!

                                                                                   Dovetailed Halving

Because the ratio of 6mm by 1mm was to small for our Dove Tailed joints,

                      we were made to make the ratio of 6:1 to 60:10 to make and accurate 
                      measurement on our dovetailed joints.

For our joints we used a chisle,hammer, hand saw, 

square ruler, even some that i had never seen befor 

such as the Ruler that extends out to 1meter.

                  

Along the way i had little issues here and there, some big some minnor but with a little help from our tutor i was ok again. With my Corner Halving joint, i cut passed on one of the lines that i had crossed out. With a little common-sense i measured my next line on the long piece of wood just above the half way line i had measured out. From this mistake of mines, i learnt a valuable lesson, witch was to always cut out one piece a time and to always double check. Besides my first major mess up with my corner halving joint, i had other minnor problems with my other joints, such as chiped edges, short sided and gaps between joints.