IHS

I-Joist Hole Support

The IHS is designed to strengthen I-joists when holes are required to be cut in locations not normally permitted.

  • Allows holes to be cut 50mm from bearing point, which allows services to run close to external walls.
  • Variable hole sizes from 150mm to a maximum width of 250mm.
  • Supplied as 2 sets of 2 interlocking plates (1 set per side of I-joist) which always allows the IHS to be fitted, even when services are already in-situ.
  • Helps to eliminate expensive and time consuming joist trimming for SVP (soil vent pipe) runs.
  • Can be used on single and double ply I-joists.
Service class 2
Electrogalvanized steel 20µm

Product Details

Features

Materials

  • Pre-galvanised mild steel

Technical Data

Dimensions

IHS Product Dimensions

References Joist Size [mm] Hanger Dimensions [mm] Connector Holes Fasteners
A B C D1 D2 t Ø4 Triangular 150 mm Bracket Opening 250mm Bracket Opening
Specification Quantity Quantity Specification
IHS195 195-200 150 250 191 150 250 1.5 10 3 3.75x30mm 24 32 3.75x30mm
IHS220 220-225 150 250 216 150 250 1.5 10 3 3.75x30mm 24 32 3.75x30mm
IHS235 235 150 250 231 150 250 1.5 10 3 3.75x30mm 24 32 3.75x30mm
IHS240 240-245 150 250 236 150 250 1.5 10 3 3.75x30mm 24 32 3.75x30mm
IHS300 300-302 150 250 236 150 250 1.5 10 3 3.75x30mm 24 32 3.75x30mm

1) Use 3.75x30mm Square Twist Nails

2) Number of fasteners is per hole in joist

IHS Performance: James Jones (JJI A+) I-Joist

References Joist Type Joist Height [mm] Max. allowable hole size with IHS (d x w) Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 ply Double Ply 1 ply Double Ply
IHS195 JJI-Joist A+ (47mm) 195 100 x 250 2.62 3.49 3.38 8.51
IHS220 JJI-Joist A+ (47mm) 220 120 x 250 2.76 3.72 6.80 9.06
IHS235 JJI-Joist A+ (47mm) 235 140 x 250 2.9 3.86 7.06 9.42
IHS240 JJI-Joist A+ (47mm) 245 150 x 250 2.97 3.96 7.25 9.66
IHS300 JJI-Joist A+ (47mm) 300 200 x 250 3.41 4.55 8.32 11.09

IHS Performance: James Jones (JJI B+) I-Joist

References Joist Type Joist height [mm] Max. allowable hole size with IHS (d x w) Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 ply Double Ply 1 ply Double Ply
IHS220 JJI-Joist B+ (63 mm) 220 120 x 250 3.07 4.10 7.49 9.98
IHS235 JJI-Joist B+ (63 mm) 235 140 x 250 3.18 4.23 7.74 10.32
IHS240 JJI-Joist B+ (63 mm) 245 150 x 250 3.25 4.33 7.91 10.55
IHS300 JJI-Joist B+ (63 mm) 300 200 x 250 3.67 4.89 8.95 11.93

IHS Performance: James Jones (JJI C) I-Joist

References Joist Type Joist Height [mm] Max. allowable hole size with IHS (d x w) Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 ply Double Ply 1 ply Double Ply
IHS195 JJI-Joist C (72 mm) 195 100 x 250 3.06 4.08 7.46 9.95
IHS220 JJI-Joist C (72 mm) 220 120 x 250 3.22 4.30 7.85 10.47
IHS235 JJI-Joist C (72 mm) 235 140 x 250 3.33 4.43 8.11 10.81
IHS240 JJI-Joist C (72 mm) 245 150 x 250 3.40 4.53 8.28 11.04
IHS300 JJI-Joist C (72 mm) 300 200 x 250 3.81 5.08 9.29 12.39

IHS Performance: James Jones (JJI D) I-Joist

References Joist Type Joist Height [mm] Max. allowable hole size with IHS (d x w) Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 ply Double Ply 1 ply Double Ply
IHS220 JJI-Joist D (97 mm) 220 120 x 250 3.62 4.83 8.83 11.77
IHS235 JJI-Joist D (97 mm) 235 140 x 250 3.72 4.96 9.07 12.10
IHS240 JJI-Joist D (97 mm) 245 150 x 250 3.79 5.05 9.24 12.32
IHS300 JJI-Joist D (97 mm) 300 200 x 250 4.2 5.60 10.24 13.66

IHS Performance: Masonite H (47mm Flange) I-Joist

References Joist Type Joist Height [mm] Max. allowable hole size with IHS (d x w) [mm] Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 Ply Double Ply 1 Ply Double Ply
IHS220 H 220 120 x 250 2.25 2.7 7.56 9.08
IHS240 H 240 140 x 250 2.45 2.94 8.24 9.89
IHS300 H 300 200 x 250 3.05 3.66 10.26 12.31

IHS Performance: Masonite HM (60mm Flange) I-Joist

References Joist Type Joist Height [mm] Max allowable hole size with IHS (d x w) [mm] Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 Ply Double Ply 1 Ply Double Ply
IHS220 HM 220 120 x 250 2.25 2.7 7.56 9.08
IHS240 HM 240 140 x 250 2.45 2.94 8.24 9.89
IHS300 HM 300 200 x 250 3.05 3.66 10.26 12.31

IHS Performance: Masonite HI (70mm flange) I-Joist

References Joist Type Joist Height [mm] Max. allowable hole size with IHS (d x w) [mm] Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 Ply Double Ply 1 Ply Double Ply
IHS220 HI 220 120 x 250 2.25 2.7 7.56 9.08
IHS240 HI 240 140 x 250 2.45 2.94 8.24 9.89
IHS300 HI 300 200 x 250 3.05 3.66 10.26 12.31

IHS Performance: Masonite HB (97mm flange) I-Joist

References Joist Type Joist Height [mm] Max. allowable hole size with IHS (d x w) [mm] Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 Ply Double Ply 1 Ply Double Ply
IHS220 HB 220 120 x 250 2.3 2.7 7.6 9.1
IHS240 HB 240 140 x 250 2.5 2.9 8.2 9.9
IHS300 HB 300 200 x 250 3.1 3.7 10.3 12.3

IHS Performance: MetsaWood (FinnJoist 45mm) I-Joist

References Joist Type Joist Height [mm] Max. allowable hole size with IHS (d x w) Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 ply Double Ply 1 ply Double Ply
IHS195 FJI 45 200 100 x 250 2.25 2.63 5.41 6.31
IHS220 FJI 45 220 125 x 250 2.62 3.05 6.28 7.33
IHS240 FJI 45 240 145 x 250 2.93 3.41 7.02 8.19
IHS300 FJI 45 300 200 x 250 3.53 4.12 8.48 9.89

IHS Performance: MetsaWood (FinnJoist 53mm) I-Joist

References Joist Type Joist Height [mm] Max. allowable hole size with IHS (d x w) Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 ply Double Ply 1 ply Double Ply
IHS195 FJI 58 200 100 x 250 2.40 2.80 5.75 6.71
IHS220 FJI 58 220 125 x 250 2.79 3.25 6.69 7.81
IHS240 FJI 58 240 145 x 250 3.12 3.64 7.48 8.73
IHS300 FJI 58 300 200 x 250 3.76 4.39 9.09 10.54

IHS Performance: MetsaWood (FinnJoist 69mm) I-Joist

References Joist Type Joist Height [mm] Max. allowable hole size with IHS (d x w) Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 ply 1 ply Double Ply Double Ply
IHS195 FJI 70 200 100 x 250 2.48 2.89 5.95 6.94
IHS220 FJI 70 220 125 x 250 2.88 3.36 6.91 8.06
IHS240 FJI 70 240 145 x 250 3.22 3.76 7.73 9.02
IHS300 FJI 70 300 200 x 250 3.89 4.53 9.32 10.88

IHS Performance: MetsaWood (FinnJoist 96mm) I-Joist

References Joist Type Joist Height Max. allowable hole size with IHS (d x w) Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 ply Double Ply 1 ply Double Ply
IHS195 FJI 89 200 100 x 250 2.48 2.89 5.95 6.94
IHS220 FJI 89 220 125 x 250 2.88 3.36 6.91 8.06
IHS240 FJI 89 240 145 x 250 3.22 3.76 7.73 9.02
IHS300 FJI 89 300 200 x 250 3.89 4.53 9.32 10.88

IHS Performance: Steico (SJL 45mm) I-Joist

References Joist Type Joist Height Max. allowable hole size with IHS (d x w) Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 ply Double Ply 1 ply Double Ply
IHS195 - - - - - - -
IHS220 SJL 45 220 130 x 250 1.50 2.11 5.93 8.30
IHS240 SJL 45 240 150 x 250 1.62 2.27 6.38 8.93
IHS300 SJL 45 300 200 x 250 1.95 2.73 7.68 10.75

IHS Performance: Steico (SJL 60mm) I-Joist

References Joist Type Joist Height [mm] Max. allowable hole size with IHS (d x w) Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 ply Double Ply 1 ply Double Ply
IHS195 - - - - - - -
IHS220 SJL 60 220 130 x 250 1.49 2.09 5.88 8.23
IHS240 SJL 60 240 150 x 250 1.60 2.25 6.32 8.85
IHS300 SJL 60 300 200 x 250 1.93 2.70 7.59 10.62

IHS Performance: Steico (SJL 90mm) I-Joist

References Joist Type Joist Height [mm] Max. allowable hole size with IHS (d x w) Shear Capacity at Location of IHS [kN]
Permissible loads (Intermediate Floor Joist Applications) Characteristic capacity
Vhole (IHS Installed) Vk,hole (IHS Installed)
1 ply Double Ply 1 ply Double Ply
IHS195 - - - - - - -
IHS220 SJL 90 220 130 x 250 1.48 2.07 5.83 8.16
IHS235 - - - - - - -
IHS240 SJL 90 240 150 x 250 1.59 2.22 6.26 8.76
IHS300 SJL 90 300 200 x 250 1.90 2.66 7.49 10.48

Installation

Installation

Installation

  • Each IHS consists of 2 sets of 2 interlocking plates with one set required for each side of the I-joist.
  • The outer edge of the holes cut into the web of the I-joist can be a minimum of 50mm from the inner face of the blockwork.
  • Holes can be cut into the web of the I-joist before or after installation of the IHS.
  • Holes must fit within the internal aperture of the IHS.
  • Place the IHS onto the I-joist so that the top and bottom sliding flanges are aligned vertically central onto the top and bottom chords of the I-joist.
  • Open or close the IHS to the required width, ensuring that the two sections overlap by at least one row of nails (minimum overlap of 45mm).
  • Install 3.75x30mm square twist nails through all round holes into the top and bottom chords of the I-joist.
  • Repeat the above steps to install plates on the other side of the I-joist, completing the installation.

CAD Library

DWG (2D) REVIT (2D) DWG (3D) REVIT (3D) SAT XML
No items available.
No items available.
No items available.
No items available.
No items available.
No items available.

Buy from Distributor

No items available.