https://members.theihe.org/forums/posts.aspx?group=214541&topic=1776157 Sun, 7 Jun 2026 17:13:28 GMT Sat, 18 May 2024 17:05:22 GMT Copyright © 2024 Institute of Highway Engineers https://members.theihe.org/forums/posts.aspx?group=214541&topic=1776157 https://members.theihe.org/forums/posts.aspx?group=214541&topic=1776157 Tue, 16 Apr 2024 11:57:43 GMT https://members.theihe.org/forums/posts.aspx?group=214541&topic=1776158 https://members.theihe.org/forums/posts.aspx?group=214541&topic=1776158
So there is really no need for your software to offer you this option. SignLoad from Buchanan Computing always uses the 25-year return interval speed. ]]> Tue, 16 Apr 2024 12:10:26 GMT https://members.theihe.org/forums/posts.aspx?group=214541&topic=1776162 https://members.theihe.org/forums/posts.aspx?group=214541&topic=1776162
Yes, I'd noticed that in NA.2.

BS EN 12899-1 mentions both 25 year and 50 year wind loading but it doesn't say why you'd choose the larger value. Hence the query.

I think what you've said should nail it and we'll continue with 25 years as standard.]]> Tue, 16 Apr 2024 13:15:26 GMT https://members.theihe.org/forums/posts.aspx?group=214541&topic=1776180 https://members.theihe.org/forums/posts.aspx?group=214541&topic=1776180 Tue, 16 Apr 2024 14:27:23 GMT https://members.theihe.org/forums/posts.aspx?group=214541&topic=1776202 https://members.theihe.org/forums/posts.aspx?group=214541&topic=1776202

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