Technical regulation governing masonry support

(extracts)

1. DIN 1053 Part 1 Masonry; masonry according to formulation,
design and execution.
Edition dated November 1996

8.4.3 Double-leaf outer walls
8.4.3.1 Types of design and general regulations for execution.

b) The outer wall has a minimum thickness of 90 mm.
Thinner outer walls are referred to as linings, the execution of which is governed by DIN 18515. Brick piers in the outer wall which need only bear loads from the outer wall have a minimum length of 240 mm. The outer wall must be fully supported over its complete length. If borne on intermittent supports (e.g. brackets), all bricks must be supported at both ends in the supported plane.

c) Outer walls with a thickness of 115 mm must be supported at vertical intervals of approx. 12 metres.
They may protrude up to 25 mm beyond their support.  If the 115 mm thick outer wall is no more than two storeys high or is supported every two storeys, it may protrude beyond its supports by up to one-third of its thickness.  This overhang must be taken into account when demonstrating the pressure on the supports. Refer to 8.4.2.2. with regard to execution of the joints in the fair face of facing walls.

d) Outer walls less than 115 mm thick must not rise more than 20 metres above the ground and must be supported at vertical intervals of roughly 6 metres. On buildings with up to two full storeys, the triangular gable may rise to a height of 4 metres without additional support. These outer walls may protrude not more than 15 mm beyond their supports. Joints in the fair faces of such facing walls must be smoothed.

e) The masonry walls must be connected by means of wire ties made of stainless steel with the material numbers 1.4401 or 1.4571 to DIN 17 440. The wire ties must correspond with Figure 9 as
regards form and dimensions. The vertical distance between wire ties must not exceed 500 mm, the
horizontal distance 750 mm.
In addition to the requirements specified in Table 11, three wire ties must be fitted per metre edge length along all free edges, in openings and at quoins, along expansion joints and at the upper ends of the outer walls.
Other methods of anchoring the wire ties are permitted if test certificates can prove that the type of anchorage used can absorb a tensile and compressive force of at least 1 kN with 1.0 mm slip
per wire tie. The number of wire ties must be increased accordingly if either of these values is not achieved. The wire ties must be produced with due regard for their structural effect so that they cannot transmit moisture from the outer wall to the inner wall (e.g. by fitting a plastic washer).

g) Supporting structures which can no longer be inspected after installation must be durably protected against corrosion.