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1
Content available remote Glulam, LVL and X-lam – engineering wood products in the buildings of the future
Kotwica E., Krzosek S.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
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2018
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No. 104
256--260
EN
This paper is to present shortly primary engineered wood products and their use in the buildings of the future. Engineered wood products are listed with basic information. Examples of tall timber buildings are presented with short characteristics pointing similarities and differences. The necessity to keep accuracy in design and execution is noted.
2
Content available Strength enhancement of timber beams using steel plates – review and experimental tests
Nowak T., Jasieńko J., Kotwica E., Krzosek S.
Drewno : prace naukowe, doniesienia, komunikaty
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2016
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vol. 59, nr 196
75--80
EN
This paper reviews selected historical and modern methods of strengthening timber structures using steel plates. The results of experimental testing are also presented, emphasizing that the differences in the results obtained were a result of the application of different strengthening methods, test specimens, etc. The need to develop design guidelines related to reinforcement methods is also emphasized. Appropriate reinforcement depends on the application, arrangement and ratio of the reinforcement. The increase in the load-bearing capacity of the beams reinforced by bonded or glued-in plates in comparison to the unreinforced elements was found to be similar to the models reinforced with fibre reinforced polymer (FRP). The increase in stiffness was, however, higher than in the case of the FRP reinforcement. Due to the influence of temperature and humidity on the strength and deformation of the bonding if glued-in or bonded plates are used, additional strengthening of the connection using a mechanical connector is recommended. These connectors also protect against rapid destruction in the case of fire.
3
Content available remote Comparison of sawn timber strength classes determined according old and new standards
Kotwica E., Krzosek S.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
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2014
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No. 87
109--113
EN
Comparison of sawn timber strength classes determined according old and new standards. This paper is to present the results of investigation and analyses made by the authors concerning comparison of old and new structural timber classes. The paper shows selected characteristics of strength classes relevant to visual grading (classes KW, KS, KG). The analysis shall help both – designers and experts – to estimate properly today’s strength class of the timber in all cases of rebuilding or analyzing of old construction.
4
Content available remote Konstrukcje dachowe z drewna litego i klejonego
Policińska-Serwa A., Kotwica E.
Materiały Budowlane
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2011
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nr 6
4-7
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