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Larger door openings 

For openings over 1 m width galvanized slotted steel strip [width 20 mm, material thickness 1.5 mm] has proved itself as lintel reinforcement. Other suitable profiles are also possible.

The slotted steel strip is laid edge-on in machined or cut joints a few centimetres above the opening in the covering block layer. Both sides of the wall are to be reinforced and the joints offset in height by ca. 5 cm from each other.

The reinforcement should bond into the wall some 50 cm on both sides of the opening. With larger room heights it is recommended that the block row lying above should also be reinforced.