Squared timber
As Squares ( Eckhölzer ) is called Wood the by sawing with four in right angle is provided to each other surfaces in the fiber direction. The cross-sectional area is at right angles to these areas and is called end grain or end grain .
Designations
As sawn timber according to DIN 68252, squared timbers have a minimum dimension of 6 cm, as structural lumber (DIN 4074) 4 cm, and each correspond to a maximum thickness-width ratio of 1: 3. This distinguishes them from the longer cross-sections ( boards or planks ) and smaller ones (such as laths ).
If one side of the cross-section is wider than 20 cm, the timber (in common usage) is called a beam according to the standard . For this and the designations of whole, half, crossed wood and frame, see types of cut .
use
Application forms of squared timber as structural timber:
- Truss , e.g. B. on houses or bridges
- Rafters
- Ceiling beams
Squared timber is used both in construction and in furniture joinery . They serve as table legs , struts, armrests and much more.
Norms and standards
- DIN 4074-1 (2003-06) Sorting wood according to load-bearing capacity - Part 1: Softwood lumber.
- DIN 4074-5 (2003-06) Sorting wood according to load-bearing capacity - Part 5: Hardwood lumber .
- is also binding for Austria as ÖNORM DIN 4074-x
- DIN 68252-1 Terms for sawn timber, shape and dimensions.
literature
- Helmuth Neuhaus: Timber engineering. 2nd Edition. Vieweg + Teubner Verlag, Wiesbaden 2009, ISBN 978-3-519-15248-4 .
