7.18 — Multibay canopies 7.4 Free-standing walls, parapets, fences and signboards (1) The values of the resulting pressure coefficients cp,net for free-standing walls and parapets depend on the solidity ratio ϕ. For solid walls the solidity ϕ should be taken as 1, and for walls which are 80 % solid (i.e. have 20 % openings) ϕ = 0,8. Porous walls and fences with a solidity ratio ϕ≤ 0,8 should be treated as plane lattices in accordance with 7.11. NOTE For parapets and noise barriers of bridges see Section 8.
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