Skewed Masonry Hanger

The RHMSK is designed to support solid timber joists, I-joists or metal web
joists from masonry walls.

CE Marking

Product Details


Typical RHMSK skew of 45° Right
RHMSK with a 90° Right Skew



  • Pre-galvanised mild steel


  • Due to non-welded manufacture, lead times reduced
  • Hanger design enables skew angles from 5˚-90˚ left or right
  • Full 90˚ skew option replaces the trimming detail around soil pipes

Technical Data


Product Dimensions

References Joist Size [mm] Product Dimensions [mm] Joist holes
Width Height A B C D E t Skew Ø4.1 [mm]
SPEC E RHMSK61-150100-40061-150100-40075240752.55 - 854

Product Capacities – Timber to Masonry

References Product capacities - Timber to masonry
Number of Fasteners Characteristic Capacities [kN] Safe working loads [kN]
Joist R1.k R1,SWL
Qty Type 3.5N/mm² Solid AAC 7N/mm² Solid DAC 3.5N/mm2 Solid AAC 7N/mm2 Solid DAC
SPEC E RHMSK4N3.75 x 30mm13146.57.5
RHMSK90RH4N3.75 x 30mm6633
RHMSK90LH4N3.75 x 30mm6633
  1. Loads are based upon tests conducted by CERAM Building technology and are determined in accordance to EN845-1
  2. The block thickness must be at least the same size as the top flange depth
  3. Skew angle to be specified in accordance to the illustration.




Build the masonry to the required level and leave to cure.

  • Place hangers onto supporting block work, ensuring the hanger back flange is tight against the face of the block work.
  • Continue with masonry above hanger ensuring a minimum of 675mm of masonry is above the hanger top flange and leave to cure.
  • Mortar must be fully cured before any load is applied to the hanger.
  • Install the joist into the hanger. The joist should be tight into the back of the hanger. A maximum gap of 6mm is permitted.
  • Fix the joist to the hanger using all specified fasteners.
  • If installing I-joists, web stiffeners are required. Web stiffeners should be installed in accordance with I-joist manufacturers recommendations.
  • Where the 90˚ skewed variant is used to frame around soil vent pipes, a solid blocking piece is to be fitted between the joist and hanger back flange so the joist is positioned 50mm from the face of the masonry wall.
  • The blocking piece must be fitted to the joist prior to installing into the hanger. The blocking piece must be the same depth as the joist, the width to suit the remaining gap, and be at least 100mm long.


How to Order

  1. Specify hanger finished height and width.
  2. Specify skew angle and direction - Left or Right


For joist 200mm deep by 100mm wide with a right directional skew of 45˚ the code to order would be: RHMSK200/100 SKR45.


Declaration of Performance (DoP)

CAD Library

No items available.
No items available.
No items available.
No items available.
No items available.
No items available.

Buy from Distributor

No items available.


Simpson Strong-Tie U.K.

Simpson Strong-Tie

Cardinal Point, Winchester Road
B78 3HG
United Kingdom