Cullen Hi-Vis Gripper Technical Guide 2025

HV–GR Hi–Vis Gripper

Features & Benefits

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.

Patent Number GB2511155

Easily identifiable for post installation inspection

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

Meets relevant requirements and certification - NHBC, BBA, UKCA & CE

HV–GR–1 38 – 53MM WIDE

Force fit installation (no nails or mastic sealant required , or need to trim joists to fit)

Fire tested up to 60 mins In compliance with approved document B

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

Meets the sound requirements of a proprietary joist cap as specified by Appendix A, Robust Details Part E Handbook

Compliance Part L air tightness requirements - 68% more efficient than NHBC end seal detail requirements

Material Specification High density Polyethylene

HV–GR–2 58 – 72MM WIDE

Additional parallel and perpendicular restraint may be required. Please refer to the Cullen Technical Guide for further guidance on built in restraint.

1.02 m3/h

(+209%)

0.33 m3/h

HV–GR–3 89 – 97MM WIDE

New Cullen Hi-Vis Gripper

NHBC detail with mastic (minimum requirement)

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

To find out more about the features and benefits please scan the QR code to our new HV-GR features and benefits video Features & Benefits Video

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.

The latest version of the technical guide will always be the digital format on our website.

2

Technical support: 01592 771132 / technical@itwcp.com / https://www.itwcp-offsite.co.uk 3

Technical support: 01592 771132 / technical@itwcp.com / https://www.itwcp-offsite.co.uk

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