Experimental investigation on the effects of overhang length variations of steel roof cladding under uplift pressure

• Published in: Structures (Oxford) Vol. 32; pp. 2032 - 2041
• Main Authors: Siron, Nasirah, Majid, Taksiah A., Zaini, Shaharudin Shah
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.2021
• Subjects: Low-rise building; Overhang length; Pull-through; Steel roof cladding; Windstorm damage; Overhang length; Steel roof cladding; Low-rise building; Pull-through; Windstorm damage
• ISSN: 2352-0124; 2352-0124
• DOI: 10.1016/j.istruc.2021.04.007

In the rural areas of northern Peninsular Malaysia, the common profiled steel cladding systems in many low-rise buildings are classified as non-engineered structures. These structures are made of thin steel and are crest-fixed. However, these claddings often suffer from local pull-through failure at the screw connections during a windstorm. Due to the unavailability of standard information and design formulae in Malaysia, investigation in this area is much needed. Hence, this study aims to investigate the changes in the pull-through capacity of different overhang lengths (150 mm and 300 mm) for corrugated and trapezoid roof claddings. A new simple test method using single-span cladding was conducted under loading of static uplift pressure using a hydraulic testing machine. The results demonstrated that the pull-through capacity of corrugated roof cladding was higher than the capacity of the trapezoidal roof cladding. Moreover, as the overhang length was increased, the pull-through capacity of the steel cladding became smaller for both cladding profiles. Based on this observation, localised dimpling failure for corrugated cladding and cross-sectional distortion for trapezoidal roof cladding was observed. In conclusion, the pull-through capacity and applied load decreased with increased roof cladding length for both cladding profiles.