We investigated wood of the Vdmk hayrack, located in Domžale, Slovenia. The hayrack consists of a double hayrack (toplar), a stretched hayrack and a shed. According to oral information, the double hayrack was moved from the surroundings of Ljubljana to its current location around 1930. When it was re-erected, its construction was changed slightly. We measured the dimensions of all wooden elements of the hayrack, made computer drawings, identified the wood species, defined the age of the main structural parts and calculated the quantities of the timber types in the entire structure. Macroscopic and microscopic wood identification showed that the wood species used were oak (Quercus sp.) and Norway spruce (Picea abies). Dendrochronology helped us to date the outermost (the youngest) tree rings of five pillars of the double hayrack to 1829-1832. Based on these dates and on the amount of the preserved sapwood we assume that the double hayrack was built in 1832 or soon after; this is about a 100 years before it was moved to the present location. The pillars of the stretched hayrack are slightly older than the ones of the double hayrack. In the stretched hayrack and shed we identified some reused timber. With the help of the SolidWorks program we plotted the whole building and calculated the amounts of timber. The hayrack contains approximately 8 m3 of oak from which 54 elements are made. The construction contains almost 37 m3 of spruce timber, from which 906 elements are made. The oak is used for the more exposed parts and the spruce for the less exposed ones. The double hayrack, as the largest part of the building, consists of 588 elements, whereas the stretched hayrack consists of 95 and the shed of 277 elements. This thesis represents the first research in which we jointly used exact wood identification, dendrochronological dating and calculated the amounts of timber used to build the hayrack.