OPEN GRILLE / GRATING (Galvanised Saddle Assemblies)

Tools:	Variable speed drill (electric, pneumatic or battery). P-3 driver for drill. 1/4" High speed steel drill bits. Steel rule. Centre punch. Hammer. 10mm open socket with arm. (ratchet or tension wrench optional). Artline pen or similar.
Safety Clothing:	Safety glasses. Ear muffs. Safety boots.
Fasteners:	Galvanised Saddle Assemblies (Part No: 12-205). Consisting of : 1 pce M6x50mm Pan Head, Phillips drive zinc plated metal thread. 1 pce hot dip galvanised universal saddle. 1 pce 6mm Nyloc locking nut.

Procedures:

1. Check all steps and establish if they are all the same configuration. If they are, one Stair Nosing can be marked for drilling and used as a template for the other Stair Nosings to be installed.
2. Working down from the top step, place the first Stair Nosing in the desired position on the grating step.
3. Mark the correct position for the holes on the surface of the Stair Nosing. The optimum position for holes is centrally between the transverse and longditudimal grating bars. Try to mark the surface so that the holes will be more than 40mm from any edges of the Stair Nosing.
4. Measure the distance of the points marked from each side and the back of the Stair Nosing. (Not the leading edge).
5. Turn the Stair Nosing up-side-down and, using the measurements, make reciprocal marks on the underside of the Stair Nosings.
6. Using the hammer and centre punch, make an indent on the marks which are on the underside.
7. Drill 1/4 inch holes using the indents to direct the drill bit. Always drill from the underside through to the antislip surface.
8. Turn the Stair Nosing back over and replace it in the desired position. Insert the 6mm metal threads into the holes.
9. Place a saddle under the grating step so that a metal thread goes through it's hole and it fits snugly under the grating.
10. While holding the saddle in place, screw a Nyloc nut onto the metal thread, finger tight (3-4 turns).
11. Place the socket over the Nyloc nut under the step and, at the same time insert the P-3 driver (in the drill) into the head of the metal thread.
12. Slowly tighten the metal thread, ensuring that the saddle remains fitted to the underside of the grating.
13. Tighten the saddle assembly until the Stair Nosing is secure. (Approx. 5 ft/lb).
14. If all holes were in the correct position, using the previously obtained measurements, repeat procedures 5-13 for the other Stair Nosings.

Please Note:

• Do not leave any Stair Nosings loose on steps as this creates a hazard for other personnel using the steps.
• It is advisable to only install one flight of steps at a time.
• If there is no access under a step, it is advisable to use Stainless Steel Saddle Assemblies.

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CHEQUERPLATE

Tools:	High torque variable speed drill (electric or pneumatic). P - 3 driver for drill.
Safety Clothing:	Safety glasses. Ear muffs. Safety boots.
Fasteners:	Series 500, 12 gge Tek Screws. (Part No: 12-215)

Procedures:

1. Insert the P-3 driver into the drill chuck and tighten.
2. Working down from the top step, place the first Stair Nosing in the desired position and apply weight with one foot.
3. Insert the end of a Tek Screw onto the P-3 driver and place the drilling end onto the Stair Nosing in the desired position.
4. While applying weight, activate the drill on low speed. The Tek Screw will drill through the Stair Nosing and chequerplate after which, it will self tap the chequerplate and fasten the Stair Nosing.
5. Repeat procedures 3 and 4 until the correct number of fasteners have been attached and move on to the next step.

Please Note:

• If the P-3 driver keeps popping out of the Tek Screw, either the drill speed is too fast or not enough weight is being applied to the drill.
• It is advisable not to install Tek Screws closer than 40mm from a Stair Nosing edge.
• If the chequerplate is thicker than 6mm, it may have to be predrilled using a 3/16" drill bit, before the Tek Screws will secure themselves.

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CONCRETE STEPS

Tools:	Variable speed hammer drill (electric or pneumatic). 6mm High speed steel drill bits. 6mm Tungsten tip masonary drill bits. Steel rule. Centre punch. Hammer. Artlipe pen or similar.
Safety Clothing:	Safety glasses. Ear muffs. Safety boots.
Fasteners:	Concrete Anchors HPS6/5 (Part No. 12-220). Concrete Anchors HPS/12 (Part No. 12-222). Concrete Anchors HPSR6/12 Stainless Steel (Part No. 12-225).

Procedures:

1. Check all steps and establish if they are all the same configuration. If they are, one Stair Nosing can be marked for drilling and used as a template for the other Stair Nosings to be installed.
2. Working down from the top step, place the First Stair Nosing in the desired position on the concrete step.
3. Mark the correct position for the holes on the surface of the Stair Nosing. Try to mark the holes so that they are more than 40mm from any edges of the Stair Nosing.
4. Measure the distance of the points marked from each side and from the back of the Stair Nosing. (Not the leading edge).
5. Turn the Stair Nosing upside down and, using the measurements, make reciprocal marks on the underside of the Stair Nosing.
6. Using the hammer and centre punch, make an indent on the marks which are on the underside.
7. Drill 6mm holes using the indents to direct the drill bit. Always drill from the underside through to the antislip surface.
8. Turn the Stair Nosing back over and replace it in the desired position.
9. Using the 6mm Tungsten tip masonary drill bit, drill into the concrete using the predrilled holes in the stair nosing as a location guide.
10. Place nylon insert into first hole prior to drilling second and subsequent holes in the concrete which will ensure all holes line up with holes in the nosing.
11. Remove concrete dust from step and nosing.
12. Place the nylon insert into the holes located in the stair nosing and through into the holes drilled into the concrete.
13. Using the hammer, tap the nail into the nylon insert until it is flush with the top of the anchor.
14. If all holes were in the correct position, using the previously obtained measurements, repeat procedures 5 -13 for the other Stair Nosings.

Please Note :

• Do not leave any Stair Nosings loose on steps, as this creates a hazard for other personnel using the steps
• It is advisable to install one flight of steps at a time.
• To avoid the slapping noise from pedestrial traffic, a bead of Sikaflex can be laid around the edge of the nosing before application.

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