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Research Paper | Structural Engineering | Volume 15 Issue 8, August 2026 | Pages: 322 - 325 | India
Design of a Common Base Plate, Anchor Bolt Group and RCC Pedestal for a Four-Column CHS Hoarding Mast under Large Overturning Moment
Abstract: Hoarding structures carry a large advertisement panel on a slender mast, so wind rather than gravity governs the foundation design. Where the mast uses several columns on a single common base plate, the axial force couple between the columns produces an overturning moment far larger than the sum of the individual column moments, and the connection cannot be designed as a set of independent column bases. This paper presents the design of the base plate, the 60-bolt anchor group, the RCC pedestal and the isolated footing for a 19 m wide, 18 m tall hoarding carried on a four-column circular hollow section (CHS) mast. The four leg reactions are first combined into a single resultant force and moment system at the plate centroid, giving P = 611.8 kN and M = 5772.6 kN?m, in which the force-couple term alone accounts for 4446.8 kN?m, about 4.4 times the summed local leg moments. The resultant is then redistributed across the full bolt group by the elastic method. A 1900 mm x 1900 mm x 50 mm plate with 60 nos. M36 Grade 8.8 bolts, a 2200 mm x 2200 mm x 1200 mm M30 pedestal and a 6.7 m x 6.7 m isolated footing at 2.0 m embedment are shown to be adequate, with maximum bolt tension utilisation of 47.4 percent, combined shear-tension utilisation of 0.225 and pedestal moment utilisation of 34.5 percent. The governing constraint is found to be geometric rather than strength-based: the anchor bolt edge distance provides only 2 mm of margin over the code minimum.
Keywords: Common base plate, anchor bolt group, RCC pedestal, hoarding structure, overturning moment, IS 800
How to Cite?: Sahil Abdulgani Shaikh, G. V. Joshi, "Design of a Common Base Plate, Anchor Bolt Group and RCC Pedestal for a Four-Column CHS Hoarding Mast under Large Overturning Moment", Volume 15 Issue 8, August 2026, International Journal of Science and Research (IJSR), Pages: 322-325, https://www.ijsr.net/getabstract.php?paperid=SR26809015118, DOI: https://dx.doi.org/10.21275/SR26809015118