Radius Bend (Duct)
1.2 3D Sketching – Isometric Projection Refer to module 2 – unit 2. 1.3 First and Third Angle Orthographic Projection Refer to module 2 – unit 2. 1.4 Calculation of Insulation Allowances The allowances for insulation would be the same as for any square or rectangular duct. This equals the perimeter of the rectangular bend plus eight
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