A European Technical Assessment is issued by a Technical Assessment
Body (TAB). The European TABs are organized in the European
Organization for Technical Assessment (EOTA).
Based on an ETA, a certificate of constancy of performance and a
declaration of performance (DoP) of the manufacturer, a CE marking
may be affixed to the products. In the current phase of change, national
approvals, European Technical Approvals (ETA "old"), and European
Technical Assessments (ETA "new") are available for various product
groups. CE marking is therefore a declaration that the product meets
certain safety requirements such as mechanical and/or fire resistances.
The application for a European Technical Assessment of EOTA (ETA) and
the associated CE marking is voluntary. The ETA contains all required
characteristic values, which have been obtained and verified according to
the recognized rules of technology. It is the unique opportunity to describe
the performance characteristics of column shoe systems.
Peikko's approach is much more comprehensive – not only the safetyrelevant
properties of a product are in focus, but also the corresponding
technical rules and dimensioning regulations are constantly improved
and further developed with the aim of providing faster and more efficient
system solutions for the user. This supports further development of
reinforced concrete construction in the long run.
BOLDA® COLUMN SHOES
GEOMETRY
BOLDA® column shoe connections are used to create cost-effective
moment resisting stiff connections between precast concrete columns
and foundations, or between precast concrete columns.
The system consists of column shoes and corresponding anchor bolts.
Column shoes are cast into precast a concrete column, whereas anchor
bolts are cast into foundation or another column. On construction site, the
columns are erected on the anchor bolts, adjusted on the correct level and
vertical position, and fixed to the bolts. Finally, the joint between column
and base structure is grouted (Figure 2).
The BOLDA® column shoe (see Figure 3) consists of a horizontal base
plate, vertically arranged side plate, vertical main anchorage bars and
bent rear bars. Additional non-structural steel sheets, which serve as
moulds when concreting the column, may be present. The components of
the column shoe are connected to each other by welding.
The main dimensions of the different sizes of BOLDA® column shoes are
given in Figure 4.
FIGURE 2: EXAMPLE FOR AN APPLICATION WITH BOLDA® COLUMN SHOE
FIGURE 3: BOLDA® COLUMN SHOE
Anchor bars
Top plate,
optional
Rear bars
Side plate
Base plate
PEIKKO CONNECTIONS 1/2021 47