SHS Jointing, Flowdrill & Hollo-Bolt - Tata Steel

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V tp Drilling requirements: Hollo-Bolt uses a plain drilled hole which can be made on site or in the fabrication shop using all normal drilling equipment. The finished hole should have a tolerance of -0.2mm to +1.0mm from the nominal given in the data table (Table 4). tc Material Options Standard product is manufactured from mild steel and is electro-zinc plated with the addition of JS500 1000 hour saltspray corrosion protection. The central fastener is a grade 8.8 bolt. For special applications, the Hollo-Bolt is available manufactured from 316 stainless steel, with a grade A4-80 central bolt. This will not be a stocked item, and would be manufactured to order. Installation The only tools required to fit Hollo-Bolt are two spanners - an open ended spanner to hold the collar and a torque wrench to tighten the central bolt. Alternatively a power operated electric hand tool is in development. Should the steelwork need to be adjusted, the fixing can simply be removed and the hole reused with another Hollo-Bolt. Sealing Options Width X Bolt size In certain applications, it may be necessary to seal the Hollo-Bolt to prevent ingress of water or other corrosive agents. For details of sealing options available, please contact Lindapter. Special Options (manufactured to order) ● Stainless steel ● Button head setscrew ● Socket head capscrew ● Countersunk setscrew/body ● Special body lengths Y M8 M10 M12 M16 M20 Bolt length (V) W mm 45 49 53 57 80 Fixing thickness (W) Min Max mm 3 22 3 22 3 25 3 28 3 34 Fig. 6 E 1 Bolt centres (X) Min mm 35 40 50 55 70 Internal min. edge distance (Y) mm 13 15 18 20 25 Edge distance (E1) Min mm 50-tp 55-tp 60-tp 65-tp 90-tp Bolt hole dia. (Dh ) mm Table 4 (See Fig. 6 for nomenclature) 14 18 20 26 33 Across flats main body mm 19 24 30 36 46 Fig. 7 Tightening torque Nm 21 40 78 190 300
Design of Joints in Simple Construction Simple connections between Universal beams and RHS columns can be made using double angle web cleats or flexible end plates. The following procedural checks are compatible with the BCSA/SCI rules for Joints in Simple Construction (Ref. 2). Length of cleat I ≥ 0.6D Cleat thickness, t p t p = 8mm or 10mm Notes Double Angle Cleats Flexible End Plates End projection t 1 , approx 10mm Face of column Length of plate I ≥ 0.6D Face of column D I D I g Bolt diameter, d g Bolt diameter, d Flowdrill hole diameter, D h D h = d+2mm for d ≤ 24mm D h = d+3mm for d > 24mm For Hollo-Bolt D h see Table 4. Plate thickness, t p t p = 8mm or 10mm ● The cleats or end plates are generally positioned as close to the top flange of the beam as possible to provide adequate positional restraint and a plate length of at least 0.6D is usually adopted to give adequate torsional restraint (BS 5950: Part 1, Table 9). ● Bolt gauge g: 90mm ≤ g ≤ 140mm, but g ≥ 0.3 x RHS face width B. ● Although it may be possible to satisfy the design requirements with t p < 8mm, it is not recommended in practice because of the likelihood of weld distortion during fabrication and damage during transportation. ● The plate thickness and gauge limitations apply equally to partial depth and to full depth end plates. If necessary, to comply with structural integrity requirements for a 75 kN tie force, the connection must have at least 2 no. M20, Grade 8.8 bolts in tension with / ≥ 140mm, t ≥ 8mm and g ≤ 140mm.
Page 1 and 2: Corus Tubes library publication The
Page 3 and 4: Flowdrill&Hollo-Bolt Flowdrill & Ho
Page 5 and 6: Flowdrill Flowdrill The Process Flo
Page 7: Hollo-Bolt Hollo-Bolt HOLLO-BOLT is
Page 11 and 12: Bolt diameter mm M16 M20 M24 Bolt d
Page 13: British Steel Tubes & Pipes PO Box

SHS Jointing, Flowdrill & Hollo-Bolt - Tata Steel

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