Due to an increase in environmental consciousness in the construction industry there has been increasing interest in using natural building materials like rammed earth construction, straw bale construction and hempcrete construction. These materials have very small embodied energy and are carbon negative or carbon neutral. Hempcrete is a bio-composite mix made up of hemp shive, lime, cement and water. There has been extensive research undertaken on the thermal, acoustic, and mechanical properties of hempcrete. It has low density, good thermal and acoustic insulation properties, and can passively regulate humidity in a built environment. However it also has low compressive strength and modulus of elasticity. Thus hempcrete cannot be used as a direct load bearing material but can used as an infill material in timber stud walls. This thesis investigates how hempcrete can have beneficial structural effects by preventing buckling of timber (increasing the buckling load) columns when used as an infill in between columns in a timber stud wall. Eight timber walls were constructed (both half scale -1200mm high; and full scale – up to 2133mm high) with varying column dimensions. Six of the walls were infilled with hempcrete of varying density. Two walls were not infilled and were baseline tests. All walls were tested in compression. It was found that high density hempcrete (715 kg/m3) not only prevented weak axis buckling of columns but also carried some direct load. Low density hempcrete was also successful in preventing weak axis buckling of the infilled walls. In-filled walls failed in strong axis buckling at a load twice (for half scale walls with 38x89mm columns) or 4 times(full scale walls with 38x235mm columns) that of the unfilled walls. An analytical model based on buckling of a strut on an elastic foundation was proposed to predict the maximum strength hempcrete can add to a wall by preventing buckling. The timber column strength equations from CSA –O86-01 closely predicted the buckling load of the walls from the experiments. The results from the model were also put in design equations from CSA –O86-01 to predict practical failure loads if the walls failed by buckling into hempcrete. Although only a single test result was available, it was in good agreement with the model predictions. / Thesis (Master, Civil Engineering) -- Queen's University, 2012-01-30 21:18:13.842

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The subject of this diploma thesis is the construction of a timber foot bridge over the wolf run in the Šumava National Park. The total length of the bridge is 240 m with two ground plan bends. The foot bridge includes three viewing decks, two of which are covered with shed roofs. The foot bridge is divided into 16 segments. Each segment is 15 m long with a width of 2.2 meters. The ground plan dimensions of the viewing decks are approximately 15x7 and 15x11 m. As the main structural material has been chosen glued laminated timber of the strength class GL28h, other elements are made of solid timber of the strength class C24. The thesis includes an introductory document, options analysis, technical report, static analysis, bill of material and drawings.

The work deals with the design of a load-bearing wooden structure of a mountain hotel in the foothills of the Jeseníky Mountains. It is a building without cellar, two floors and a attic room. The floor plan of the building is 17 x 30 m with a porch of 3 x 10 m. Height of the building up to the ridge is 13.2 m. The design of the roof structure has been chosen from 2 different variants. Material usage consist of grown wood of class C24, glued laminated wood of class GL32h and steel S355. Static analysis was calculated by Dlubal RFEM software.

The goal of this diploma thesis is designed and reviewed the roof of the timber construction of sports structure, the span is 50 m and the length is 90 m. The design of the structure is located in Ústí nad Orlicí. The shape of the hall is arc sector. The structure is designed from glue laminated timber, solid timber and steel load bearing elements. The main load bearing elements are truss girders, which static function as two hinged arch. The stability of the girders is ensured by purlins, transverse stiffeners and longitudinal stiffeners. The stiffeners are situated in five fields. Front sides are made by girts and truss columns.