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1

Characteristic values of quality for spruce timber determined by MTG Timber Grader device

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2010
|
tom 72
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Determination of quality parameters of spruce structural timber by prediction models

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2015
|
tom 90
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Spruce timber bending strength for different loading modes

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2013
|
tom 84
4

Characteristics o spruce timber quality determined by ultrasonic and bending methods

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2009
|
tom 69
5

Quality standards for spruce wood designed for structural application in Slovakia

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2008
|
tom 64
6

Variability of the modull of elasticity along the length of timber

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2009
|
tom 69
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Influence of knots to mechanical stress grading of spruce wood timber

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2015
|
tom 92
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Multi-stage parallel model in determining the quality of structural timber by the penetration method

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2021
|
tom 114
9

Influence of wood machining on the quality of glued joint

100%
Rohanova A.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2004
|
tom 55
Carbon lamellae are used for strengthening concrete, steel, but also wooden structural members. They are glued on a structural member by means of the epopxy resin adhesive. Their application on the wooden structural members requires specific technological parameters of gluing which are being tested. A glued joint has been experimentally subjected to tensile test for a combination of materials: wood-glue-carbon lamella under the following conditions: wood machining by sanding and cutting, thickness of glue spread coatings - 0.5; 2.0; and 3.0 mm and moisture content of wood - 12%. Roughness parameters, such as Ra, Ry R7 have been specified for sanded and cut surfaces of wood using the Pocket Surf apparatus. Degree of woodworking has been optimised in keeping with the STN 49 0231 (cutting-3, moulding-5 and thickness of glue spread coatings (1 mm). The determined parameters have a profound influence on the quality of glued joint as well as on the economic evaluation of the strengthened wooden structural member.
10
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Correlations between quality parameters of structural spruce wood

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2014
|
tom 88
The quality of structural spruce wood is described with parameters: modulus of elasticity, modulus of rupture and wood density. They are determined by destructive bending tests according to EN 408. There is a dominant relationship between strength and predictive parameter representing a basis for strength grading of structural wood. Non-destructive methods based on various principles are used to determine the quality of structural wood. Correlations between parameters from destructive bending tests and non-destructive methods were evaluated. All dependences are statistically significant. This knowledge is used in two-stage prediction method for determination of modulus of rupture.
11

Determination of spruce wood density in situ

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2012
|
tom 79
12

Comparison of spruce structural timber modulus of elesticity in bending for different loading modes

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2013
|
tom 81
13

Density of structural spruce timber determined by Timber Grader device

100%
Rohanova A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2013
|
tom 81
14
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Update of quality requirements of glued products from structural timber

63%
Rohanova A., Lagana R.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2015
|
tom 90
15

Static hardness of chosen coniferous species wood

63%
Dubovsky J., Rohanova A.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2006
|
tom 58
16

Global and local modulus of elasticy of black locust wood (Robinia pseudoacacia L.) at bending load

63%
Dubovsky J., Rohanova A.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2005
|
tom 57
The contribution deals with evaluation of modulus of elasticity determined at the 4 point bending load according STN EN 408. The span length for deflection measuring and calculation of global modulus of elasticity (Ec) was 18h (height of beam) and for local modulus of elasticity (EL) only 5h. Experiment results for analysed modules were different. The local modulus of elasticity shows higher values about 13 % than global one. The mathematical relationship between global and local modules of elasticity was determined too. Application of tested method for determination of modulus at bending load should allow to determine the most objective values for design of wooden elements according the II. Limit state (STN EN 338).
17

Bending characteristics and density of spruce wood in relation to the stress grading

63%
Dudovsky J., Rohanova A.
Annals of Warsaw Agricultural University. Forestry and Wood Technology
|
2004
|
tom 55
The contribution deals with quality evaluation of timber based on the modulus of elasticity, modulus of rupture and density of spruce wood. The relationships between MOE and density, MOR and density, MOE and MOR are analysed. All experimental results and calculated relationships are compared to the standard results and relationships. Effect of density to the tested mechanical properties (MOE and MOR) is significant and with increasing of density the values of both mechanical properties increased too. The relationship between MOE and MOR is very closed and direct proportion.
18

Analysis of core-side and core-core structural timber

63%
Rohanova A., Lagana R.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2011
|
tom 75
19

Increasing of structural timber quality by finger joints

63%
Rohanova A., Smidriakova M.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2009
|
tom 69
20

Logs and sawn Timber Quality for building constructions

63%
Rohanova A., Nunez E.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2010
|
tom 72
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