DYNTEK presents StiFlex, a modular system of steel stiffeners, connectors and wall ties for both internal and external brick/block walls.

Manufactured from steel, StiFlex is the ideal replacement for traditional cast-in-situ reinforced concrete stiffeners. StiFlex is easier to install, providing savings in time and manpower.

Anatomy of the StiFlex™ Stiffener

Benefits

Improved Efficiency
StiFlex combines the work of steelbenders, carpenters, bricklayers and concreters into a single product.
W ith StiFlex, only bricklayers are required to complete the entire wall.

Ease of Handling
StiFlex stiffeners can be lifted and installed by two persons, without the use of lifting equipment.

Increased Durability / Fire Tested
StiFlex provides options of corrosion protection and is fire tested by the Singapore Productivity and Standards Board (PSB) for 2 hour and up to 4 hour fire rating. Details available upon request.

Ease of Installation/Order
StiFlex uses a simple sliding process to fasten wall ties; connectors sleeve into vertical or horizontal members with tolerance gap designed to allow flexibility in StiFlex length variation. No bolts, nuts or welding is required.

Sound Transmission Tested
StiFlex Stiffeners has been tested for sound transmission loss and results compared favourably against concrete stiffeners. Copy of test report available upon request.

Time Savings
Construction with wet masonry can begin immediately after installation of StiFlex stiffeners, thus saving time.

Condensation and Conductance Tested
StiFlex Stiffeners has been tested for moisture build up and heat transfer. The results compare favourably against concrete stiffeners. Copy of test’ reports available upon request.

StiFlex Standard Profile Sizes

Product codes shown above are basically the standard range of StiFlex profiles available.
SC,SCR,SCS : denotes Powder-coated steel finish
SAG : denotes Pre-Galvanised steel

NOTE: Hot-dipped galvanized steel finish is available if necessary.

For StiFlex proposal, please provide the following:

a) Wall thickness
b) Height of wall (structural height), H
c) Spacing of vertical stiffener, S1 & S2
d) Horizontal stiffener level, h1 & h2
e) External or Internal Wall

2) Loadbearing Situation

a) Wall thickness
b) Type of wall (e.g. clay brickwall, lightweight blockwall, etc.)
c) Height of wall above lintel, H
d) Width of opening, S
e) Bracket/s connection to concrete column or vertical StiFlex
f) External or Internal Wall

About StiFlex Stiffener Installation

1. The length of each vertical stiffener could ideally be up to 250mm less than the opening height.

2. The length of each horizontal stiffener should be:

• up to 250mm less than the clear distance (span) between vertical stiffener/s and/or column/s – for Non-loadbearing situation and;
  
• up to 20mm less than the opening width between vertical stiffener/s and/or column/s – for Loadbearing situation.

3. When necessary, Stiffener lengths can be shortened on site using an angle grinder

4. End Connector SCR, should be fixed using 2 fasteners (3.8mm diameter, 25mm penetration, Powder Actuated) on each side of the plate with each nail at least 75mm apart. Each fastener should also be at least 75mm from the closest concrete edge. There should be 4 fasteners for each connector.

Installation Procedure

Insert the End Connector brackets into both ends of the stiffener and position the stiffener in an upright position over its intended location.	Locate the stiffener precisely over its final position and affix to the floor or beam using 2 fasteners (3.8mm diameter, 25mm penetration) on each side of the end connector (base). Check for verticality and fasten the top connector in the same way and this time slide out the end connector till it makes contact with soffit. Proceed with blockwork.
Insert L-tiles by sliding them into the gliding slots and embed firmly onto the mortar. L-ties should be used on every 3rd or 4th block course as required (interval of 400mm centres recommended).	At the last blockcourse before the horizontal stiffener, leave out the two end pieces of block. Provide bedding mortar on the blockcourse. Install Joint Connector brackets into both ends of the horizontal stiffener.
Attach horizontal stiffener to the vertical stiffener by sliding the Joint Connector into the appropriate slot. The connector bracket is designed to allow free-play in order to ease installation.	Fill in the end blocks. Proceed with blockwork and plaster when appropriate. Optional Dyntek MetalLath can be used to assist in plastering work.

Examples of StiFlex Stiffeners Used in Other Situations

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