fischer fixing-systems main-catalogue Strana 646
Nabídka komerčních zákazníků **Nejlépe prodávané z Fischer
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Basic knowledge of fastening technology Building material – Masonry. Compared to concrete, there is a larger variety of masonry building materials. Solid brick Solid sand-lime brick Vertically perforated brick Porous sand brick 16 Masonry can be classified according to: · brick type used (e. g. natural stone, lime stone or aerated concrete). · wall type (e. g. single or double layer). · brick strength class and gross density. Generally, masonry is classified into four groups: 1 Solid bricks with a dense structure are a highly compression resistant building material, without cavities or low hole surface percentage (up to a max. 15 % e. g. as grip holes). This type is very well suited for anchor fixings. 2 Solid bricks with porous structure usually have a very large number of pores and low compressive strength. Therefore, special fixings should be used, e. g. fixings with a longer expansion zone or bonded anchors. 646 3 Perforated bricks with a compact structure (perforated and hollow bricks) are mostly manufactured from the same compressive strength materials as solid blocks but with cavities. If higher loads are introduced into these building materials, special fixings should be used (e. g. bonded anchors, FIS V), which bridge or fill the cavities. 4 Perforated bricks with porous structure have many cavities and pores and thus generally a low compressive strength. In this case, special care is required when selecting the fixing. Suitable fixings include those with a long expansion zone or form locking injection anchors.
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