Use of a tie member or rigid column bases may be necessary to reduce the eaves deflection. Where a travelling crane of relatively low capacity (up to say 20 tonnes) is required, brackets can be fixed to the columns to support the crane rails. Portal frame with internal mezzanine floor The assessment of frame stability must include the effect of the mezzanine guidance is given in SCI P292. Office accommodation is often provided within a portal frame structure using a partial width mezzanine floor. Portal frame with internal mezzanine floor Generally fabricated from UB sections with a substantial eaves haunch section, which may be cut from a rolled section or fabricated from plate. This information only provides typical details and is not meant to dictate any limits on the use of any particular structural form.
Frame types described below give an overview of types of portal construction with typical features illustrated. Many different forms of portal frames may be constructed. Portal framed structures - overview Types of portal frames 8.1.2 Bracing to restrain longitudinal loads from cranes.6.4 Sensitivity to effects of the deformed geometry.6.2 First-order and second-order analysis.