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 20 µm

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
IHS195195-2001502501911502501.51033.75x30mm24323.75x30mm
IHS220220-2251502502161502501.51033.75x30mm24323.75x30mm
IHS2352351502502311502501.51033.75x30mm24323.75x30mm
IHS240240-2451502502361502501.51033.75x30mm24323.75x30mm
IHS300300-3021502502961502501.51033.75x30mm24323.75x30mm

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
IHS195JJI-Joist A+ (47mm)195100 x 2502.623.493.388.51
IHS220JJI-Joist A+ (47mm)220120 x 2502.763.726.809.06
IHS235JJI-Joist A+ (47mm)235140 x 2502.93.867.069.42
IHS240JJI-Joist A+ (47mm)245150 x 2502.973.967.259.66
IHS300JJI-Joist A+ (47mm)300200 x 2503.414.558.3211.09

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
IHS220JJI-Joist B+ (63 mm)220120 x 2503.074.107.499.98
IHS235JJI-Joist B+ (63 mm)235140 x 2503.184.237.7410.32
IHS240JJI-Joist B+ (63 mm)245150 x 2503.254.337.9110.55
IHS300JJI-Joist B+ (63 mm)300200 x 2503.674.898.9511.93

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
IHS195JJI-Joist C (72 mm)195100 x 2503.064.087.469.95
IHS220JJI-Joist C (72 mm)220120 x 2503.224.307.8510.47
IHS235JJI-Joist C (72 mm)235140 x 2503.334.438.1110.81
IHS240JJI-Joist C (72 mm)245150 x 2503.404.538.2811.04
IHS300JJI-Joist C (72 mm)300200 x 2503.815.089.2912.39

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
IHS220JJI-Joist D (97 mm)220120 x 2503.624.838.8311.77
IHS235JJI-Joist D (97 mm)235140 x 2503.724.969.0712.10
IHS240JJI-Joist D (97 mm)245150 x 2503.795.059.2412.32
IHS300JJI-Joist D (97 mm)300200 x 2504.25.6010.2413.66

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
IHS220H220120 x 2502.252.77.569.08
IHS240H240140 x 2502.452.948.249.89
IHS300H300200 x 2503.053.6610.2612.31

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
IHS220HM220120 x 2502.252.77.569.08
IHS240HM240140 x 2502.452.948.249.89
IHS300HM300200 x 2503.053.6610.2612.31

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
IHS220HI220120 x 2502.252.77.569.08
IHS240HI240140 x 2502.452.948.249.89
IHS300HI300200 x 2503.053.6610.2612.31

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
IHS220HB220120 x 2502.32.77.69.1
IHS240HB240140 x 2502.52.98.29.9
IHS300HB300200 x 2503.13.710.312.3

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
IHS195FJI 45200100 x 2502.252.635.416.31
IHS220FJI 45220125 x 2502.623.056.287.33
IHS240FJI 45240145 x 2502.933.417.028.19
IHS300FJI 45300200 x 2503.534.128.489.89

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
IHS195FJI 58200100 x 2502.402.805.756.71
IHS220FJI 58220125 x 2502.793.256.697.81
IHS240FJI 58240145 x 2503.123.647.488.73
IHS300FJI 58300200 x 2503.764.399.0910.54

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
IHS195FJI 70200100 x 2502.482.895.956.94
IHS220FJI 70220125 x 2502.883.366.918.06
IHS240FJI 70240145 x 2503.223.767.739.02
IHS300FJI 70300200 x 2503.894.539.3210.88

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
IHS195FJI 89200100 x 2502.482.895.956.94
IHS220FJI 89220125 x 2502.883.366.918.06
IHS240FJI 89240145 x 2503.223.767.739.02
IHS300FJI 89300200 x 2503.894.539.3210.88

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-------
IHS220SJL 45220130 x 2501.502.115.938.30
IHS240SJL 45240150 x 2501.622.276.388.93
IHS300SJL 45300200 x 2501.952.737.6810.75

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-------
IHS220SJL 60220130 x 2501.492.095.888.23
IHS240SJL 60240150 x 2501.602.256.328.85
IHS300SJL 60300200 x 2501.932.707.5910.62

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-------
IHS220SJL 90220130 x 2501.482.075.838.16
IHS235-------
IHS240SJL 90240150 x 2501.592.226.268.76
IHS300SJL 90300200 x 2501.902.667.4910.48

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.

Contact

Simpson Strong-Tie U.K.

Simpson Strong-Tie

Cardinal Point, Winchester Road
Tamworth
Staffordshire
B78 3HG
United Kingdom