TECHNICAL DETAILS

(Excerpts)

1. DIN 1053 Part 1 masonry;
Masonry according to recipe, calculation and execution.
November 1996 edition

8.4.3.  Two-shell external walls
8.4.3.1. Construction types and general provisions for the implementation

b) The minimum thickness of the outer shell is 90 mm.Thinner outer shells are claddings which are regulated by DIN 18515. The minimum length of brick pillars in the outer shell that have to support loads from the outer shell only is 240 mm. The outer shell must be fully supported over its entire length. In the case of interrupted support (e.g. on brackets) all bricks must be supported on both sides in the support level.

c) Outer shells of 115 mm thickness should be supported in vertical intervals of about 12 m. They may protrude up to 
25 mm over their support. If the 115 mm thick outer shell is not higher than two storeys or is supported every two storeys, then they may protrude up to one third of its thickness over its support. These protrusions are to be take into account in the validation of support loads. For the execution of visible surfaces joints of facing shells see 8.4.2.2.

d) Outer shells of less than 115 mm thickness must not be higher than 20 m above ground level and should be supported in vertical intervals of about 6 m. In buildings up to two full storeys, a pediment of up to 4m height is possible without additional support. These outer shells may protrude up to 15 mm over their support. The joints of the visible surfaces of these facing shells should have a smooth cement finish.

e) The masonry shells should be connected via wire stays made of stainless steel with the material numbers 1.4401 or 1.4571 according to DIN 17440. The wire stays must correspond in shape and dimensions (Figure 9). The vertical spacing of the wire stays should not exceed 500 mm, the horizontal distance should not exceed 750 mm. On all free edges, at openings and building corners, along expansion joints and at the upper ends of the outer shells three wire stays per m edge length are required. Other methods of anchoring wire stays are permissible if an approval certificate exists confirming that this type of anchorage can accommodate push and pull forces of at least 1 kN with 1.0 mm slip per wire stay.

If one of these values is not achieved, the number of wire stays must be increased accordingly. The wire stays must be executed in compliance with their static effectiveness so that they cannot conduct moisture from the outer to the inner 
shell (e.g. placing a plastic washer).

g) Support constructions that cannot be checked after installation should have permanent corrosion protection.

2. DIN 18515 Part 2 Exterior wall claddings, edition April 1993
(DIN Regulation e.g. for economy facings)
The height of the external wall facing for residential buildings must not exceed two storeys plus a gable roof of 4 m in height or, for other buildings, a height of 8 m. The thickness of the facing is > 55 mm to < 90 mm. The facing material should have at least 15 mm and not more than 25 mm distance in front of the  flush on the contact area in accordance 
with DIN 1053 Part 1. Protrusions are inadmissible

3. Approval stainless steels, Z 30.3-6
Quality specifications and processing standards for stainless steels.

4. DIN 18800-7 Steel structures, May 1983 edition
A verification of suitability for welding is required. Support constructions may only be made (welded) by approved establishments. The welding work may only be performed by qualified welders.


Why the use of stainless steel?
Masonry support are statically stressed components.Perfect functioning must be guaranteed over the entire service life of the exterior façade. The connecting parts between the outer and inner masonry shell are subject to persistent humidity stress (e.g., water vapour diffusion from the inside to the outside). In addition, a check for corrosion damage after completion of the façade is, as a rule, no longer possible

In order to permanently exclude corrosion risks, we deliver masonry support for the outer shell, in accordance with 
DIN 1053 Part 1, solely in stainless steel quality.


Note: DIN 1053 Part 1 will be replaced in the foreseeable future. We are happy to take over the planning of the masonry support on the basis of the new DIN EN 1996-2 NA: 2012-01

Validation of the fixing is either the anchoring force R or Z tensile force Z and lateral force Fv of the the relevant variables according to approvals.

In any case, the conditions of approval must be observed.