: Hot-rolled steel angles are a profile commonly used as lattice bars in older types of roof girders. With the growing popularity of photovoltaic installations mounted on the roofs of steel halls, steel structure designers often face the problem of exceeding the load-bearing capacity of compressed lattice bars. This is particularly the case in old halls designed according to Polish standards. It was common practice to use reinforcements of steel structures by adding additional bars or flat bars using welding. Unfortunately, in some active industrial facilities, due to fire safety conditions, this is not possible. Therefore, this paper presents laboratory tests of axially compressed hot-rolled angles reinforced with the technique of gluing steel tapes, composite tapes and composite mats. The study involved 11 hot-rolled steel angles measuring 50x50x4 mm and 1 m long, made of S235 steel. Two angles were tested without reinforcement and were treated as reference samples. The remaining angles were reinforced with steel tapes and carbon fibre composite tapes bonded with epoxy glue or 3M VHB GPH-160GF tape. The last profile was reinforced with a carbon fibre mat. During the axial compression test, strains were measured using electro-resistance strain gauges and displacements at selected points were measured using the Aramis optical system. The results obtained showed a very beneficial effect of using bonded composite and steel tapes on limiting displacements and strains of the tested elements.