ABSTRACT
SUMMARY T e s t i n g of b u i l d i n g elements, s t r u c t u r a l members or complex s t r u c t u r e s must be based on experiences concerning the funct i o n a l behaviour of the t e s t specimens, t e s t i n g procedures and the r e l i a b i l i t y of t e s t r e s u l t s . For mass products such as, f o r example, t r a p e z o i d a l s h e e t i n g , s t a n d a r d i z e d t e s t i n g equipment, t e s t procedures and the e v a l u a t i o n of t e s t r e s u l t s have been e s t a b l i s h e d . As the numerous t e s t r e s u l t s are backed up by c o n s i s t e n t a n a l y t i c a l design models, the number of t e s t s f o r new products can be l i m i t e d . The need f o r t e s t i n g and the execution of t e s t procedures concerning t r a p e z o i d a l s h e e t i n g are d i s c u s s e d i n t h i s paper.
