It stands to reason that how you anchor a high mast, and the anchor bolts you use to do so, is an absolutely critical safety decision. One manufacturer makes the case that using large-diameter; high-strength anchor bolts not only is good practice but also makes sense commercially. As lighting column and tower manufacturers' capabilities advance in the twenty-first century, at Alupole we're finding that higher-strength steel of class 8.8 and 10.9 is becoming more widespread in its usage. Whereas the usual grade of anchor bolt used is 5.6, with yield strength of 300MPa, such higher-strength bolts offer much higher yield strength of 660MPa for 8.8 and 930MPa for 10.9 respectively. Together with larger-sized diameter bolts, such bolts are, in our experience, becoming increasingly commonly used to anchor high mast columns or tower base flanges on to concrete foundations. This article intends to consider what, in our experience, are the advantages of using such large-diameter, high-strength(LD-HS) anchor bolts (＞ M39) as opposed to more standard approaches, in other words anchor bolts that are typically of grade 5.6 and diameters of ≤ M39. We're not necessarily suggesting that any one approach is better than another - indeed, we recognise that LD-HS anchor bolts are, overall, much less commonly used within high masts.
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