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Aluminum
Still in use today, this particular exterior staircase was built as an exposition piece at our workshop in 1988. After a quick jet wash, one can only appreciate how well safety has been preserved over time.
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Steel
On the contrary and for obvious safety reasons, we were recently asked to replace this old steel staircase for a client of ours. Although the stairs had been repainted at some point, rust still had a devestating effect over time.