25/14 Masonry Restraint System - Stainless steel channel and tie system for use with partial fill
insulation and SFS steel studwork.
Wincro WC27 Masonry Restraint System
Specification Data Sheet (F30)
Project:
Wincro Metal Industries Ltd manufacture a wide range of corrosion resistant fixings, produced using
high quality grade 1.4301 (304) stainless steel. Grade 1.4401 (316) stainless steel can be specified for
use in corrosive environments. The range is designed to satisfy most standard masonry to masonry,
masonry to concrete and masonry to steel work applications.
Wincro’s Technical Design Team are available to discuss and produce bespoke ties to customer
specific requirements. Wincro can also provide a design and specification service and it is
recommended that they are consulted early in the design process.
F30 ACCESSORIES/ SUNDRY ITEMS FOR BRICK/ BLOCK/ STONE WALLING
220 WALL TIES FOR –
Wincro WC27 Channel Tie System
Designed for use with SFS steel channel studwork, the Wincro WC27 masonry restraint system is
designed to tie brickwork back to steel studwork inner leafs.
The three-part system comprises of a vertically installed Wincro WC27 25/14 Channel with prepunched holes at 112.5mm centres for use with WBSDDZP dual thread self-drilling/self-tapping
screws and WTS2C27 Safe ties to restrain masonry.
The system can accommodate various thickness rigid insulation batts.
The channel is fixed back to the steel stud using the Wincro WBTLWD driver and WBSDD#ZP screws
(without deforming the insulation).
WTS2C27 wall ties are inserted at any point along the channel’s length and are built into the bed
joints of the outer leaf as work proceeds.
Consult with Wincro technical literature for details. Wincro can also provide a design and
specification service and it is recommended that they are consulted
early in the design process.
Manufacturer:
Wincobank Works, Fife Street, Sheffield, S9 1NJ.
Tel: 0114 242 2171 Fax: 0114 243 4306
Email: sales@wincro.com Web: www.wincro.com
Product reference:
Wincro WC27 Masonry Restraint Channel Tie System
Material:
Grade 1.4301 (304) Stainless Steel
Components:
WC27 – C_
WBSDDZP – Dual Thread Self-drilling/Self-tapping Screws c/w isolation
washer channel
WTS2C27 Ties – to suit cavity, available in 75mm, 100mm, 125mm,
50mm, 175mm, 200mm, 225mm projections as standard (select from
table below).
Product Code
Cavity (mm)
Product Code
Cavity (mm)
WTS3C2775
15-40
WTS2C27150
90-115
WTS3C27100
40-65
WTS2C27175
115-140
WTS2C27125
65-90
WTS2C27200
140-165
Note, cavities are calculated from face of insulation and make allowance for depth of WC27 (15mm)
We recommend that wall ties achieve a minimum embedment of 62.5mm in the outer leaf of
brickwork (min. 50mm BS5628). Applications with a 50mm open cavity require 100mm long ties.
Installation:
WC27 channel incorporates pre-punched holes at 112.5mm close centres to ensure a fixing position
is always located near the end of a length, even when it is cut on site. It should be fixed to steel
studwork at 450mm (max) vertical centres.
The channel has a 16mm opening to easily accommodate a drive socket and washer for the BSDDZP
fixing screws.
The spacing of ties is based on the height of the building and its geographical
location, as table below.
Vertical Tie Spacing
Based on WC27 Channels at 600mm Horizontal centres.
Basic Wind Speed <25 m/s
Vertical Tie Spacing (mm)
for Heights of Brickwork
Altitude and Distance
15m
25m
40m
from coast
Altitude < 150m, and
Distance from coast >50km
Altitude <25m, and
Distance from coast <50km
450
225
225
450
300
225
Note: This system is unsuitable for use with flexible or semi-rigid insulations.