Above are Larssen sections of sheeting, including Larssen 1, 1A, 1A New, 2, 2 New, 3, 3 New, 4 New, 5, 6 and 7. Larssen sheeting was (and still is) very popular in Europe. It also figures very largely in the Soviet development of vibratory drivers and impact-vibration hammers, and appears in both Vibro-Engineering and the Technology of Piling and Boring Work and The Vibration Method of Driving Piles and Its Use in Construction.
Concerning the Soviet works, there are a couple of things to note:
- In those works the sheeting frequently appears as “Larsen” because it’s the way the Cyrillic spelling is transliterated back to the Roman alphabet.
- You will note that, in the figure above, Vulcan used Roman numerals to designate the sheeting. In the Soviet works you see both Arabic and Roman numerals used, so the sheeting profiles can be seen designated as I, Ia, Ia New, II, II New, III, III New, IV New, V, VI, and VII.
Larssen sheeting is also at the centre of the controversy between American and European designers about the ability of the interlocks to act as a neutral axis during bending. American designers have insisted that this cannot happen and this is a major reason why Z-sheeting is popular in North America.
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