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HV–GR Hi–Vis Gripper
The Hi-Vis Gripper is a build-in detail for I-joists into masonry reducing air leakage at the joist end. The Hi-Vis Gripper can be used on both external and party walls. Features & Benefits — Range of striking colours and unique design enables high visibility for post installation inspection — Bend and push fit with no mortar to front face speeds up install — Easy to install – no nailing required or need to trim joists to fit, saving time on site — Mastic not required to seal I–Joist perimeter, reducing site costs — Suitable for joists with either 90 or 100mm bearing without protruding into cavity — A major contribution to compliance with air leakage — Optional fixing for added security
Patent Number GB2511155
HV–GR–1 38 – 53MM WIDE
Build–in Detail Advantages (Requiring external mortar sealing only) — In line with existing building practice — Easy access — Quick and effective — Visual quality check from outside
HV–GR–2 58 – 72MM WIDE
Optional fixing point to secure HV-GR
Approvals — Meets NHBC technical requirements — Part E: Compliant with the requirements of Appendix A of the Robust Details Part E Handbook — Assessed to BS ISO–TR12470:1998 for 60 minute fire requirements
HV–GR–3 89 – 97MM WIDE
Material Specification High density Polyethylene
Additional parallel and perpendicular restraint may be required. Please refer to pages 129 – 130 for further guidance on built in restraint.
Available Sizes
Joist Width (mm)
Flange Depth (mm)
Joist Depth (mm)
Joist Manufacturer
38 – 53
58 – 72
89 – 97
220 245 300 220 240 300 220 240 300 220 240 300
HV–GR–220–1 HV–GR–240–1 HV–GR–300–1
HV–GR–220–2 HV–GR–240–2 HV–GR–300–2
HV–GR–220–3 HV–GR–240–3 HV–GR–300–3
James Jones (JJI)
45
HV–GR–240–1 (36mm) HV-GR-240-1 (36mm) HV–GR–300–1 (36mm)
HV–GR–240–2 (36mm) HV-GR-240-2 (36mm) HV–GR–300–2 (36mm)
HV–GR–220–3 (39mm) HV–GR–240–3 (39mm) HV–GR–300–3 (39mm)
Metsawood (FJI)
36 & 39
HV–GR–220–1 HV–GR–240–1 HV–GR–300–1 HV–GR–220–1 HV–GR–240–1 HV–GR–300–1
HV–GR–220–2 HV–GR–240–2 HV–GR–300–2 HV–GR–220–2 HV–GR–240–2 HV–GR–300–2
HV–GR–220–3 HV–GR–240–3 HV–GR–300–3 HV–GR–220–3 HV–GR–240–3 HV–GR–300–3
Steico (SJI)
39
Masonite (H, HB, HI, HL, HM)
47
The latest version of the technical guide will always be the digital format on our website.
Technical support: 01592 771132 / technical@itwcp.com / https://www.itwcp-offsite.co.uk 2
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