General Information

Figure 1 shows a farm hut.

Farm hut.
Farm hut with reinforced concrete columns

The hut has three front and three back reinforced concrete columns; the gable roof structure is made of timber, and the cover is made of asbestos roofing sheets. A raised timber floor is installed between the two central and two external columns. The longitudinal column spacing l ≅ 1.5 m, and the transverse spacing t ≅ 2.5 m.

Gable Roof Concept

Figure 2 shows the roof structure.

Gable roof structure.
Gable roof structure of a farmer hut

The rafters are placed over the ridge beam, and under it are connected two king posts and two struts, which are connected to the transverse tie beam by nails. The central columns are connected to the gable roof structure as shown in figure 3.

Central column to gable roof structure connection.
Gable roof structure and RC column connection

The king post and the transverse tie beam are placed directly over the front tie beam, which is placed directly over the central column and fastened with two concrete-embedded U-shaped steel wires.

  • What are some possible reasons to install the struts, the transverse tie beam, and the central columns?
  • Figure 4 shows two farm hut variants.

    Farm hut structures (schematic three-dimensional views)
    Variant 1 Variant 2
    Three-dimensional views of two farm hut structures

    Variant 1 is without the struts, the transverse tie beam, and the central columns, while variant 2 is without the struts, the transverse tie beam, and the front tie beams.

  • What are the main structural differences between variants 1 and 2?
    What are some possible connection details between the structural members of variants 1 and 2?
    What are some possible reasons to choose the above shown farm hut?