Operation and Maintenance Manual

Transcription

1 SNA Access Floors Operation and Maintenance Manual

2 1. SYSTEM OPERATIONS 1.1 SITE MATERIAL CONTROL A. PACKING LIST Open the shipping containers check the contents with the packing list. Determine if there are: Shortage of products Incorrect products Defective products Before reporting shortages, make sure all containers have been opened and checked. B. UNLOADING Before unloading the materials, check the job site to find the best and shortest route to the installation area. Build ramps or bridge before unloading to avoid double handling of the materials. On installation of less than 20,000 sq/ft, one pallet truck will conveniently handle the material, for larger installations, use two or more trucks. At job sites where there is no unloading ramp, or where building a ramp is not feasible, a forklift can be used. When material must be lifted to the second floor and there is no elevator, a hi-boy forklift can be used (up to a height of 30 ). When material must be lifted higher, an outside hoist should be used. C. STRATEGIC PLACEMENT OF MATERIALS Much needless work can be avoided if panels and pedestals are placed in strategic locations prior to actual installation of the access floor. Obtain a dimensioned drawing showing the location of services to be installed in the access floor area, if these services are not yet installed. Arrange the material in a fashion to minimize interference with other trades. 1.2 INSTALLATION PROCESS GENERAL FLOOR AREA A. STEP 1 - LOCATING THE STARING POINT/ SET OUT Proper location of the starting point is the most important task of the entire installation. If the contract drawings have not specifically located the module lines in relation to the building s columns, the access floor contractor must determine the most suitable grid pattern. This in turn determines the rough location of the starting point. Selecting the best grid pattern should be based on the following items listed in order of importance: Avoid cut panels 6 or less. The starting point is then determined to be approximately 6 from the 2 adjacent walls where full panels are used. If half panels are being used the rough dimension would be 5 mm. Once the starting pointy has been established, a set out is carried out. A set out refers to the access floor contractor flicking lines/marking out the starting point on the slab. A 12x12ft grid marked onto the subfloor to guide the access floor installers.

3 This process is repeated around critical and heavily serviced areas for different service trades to highlight where the access floor runs. Poor Layout : 4 inches Panel Undesirable Good Layout: Panels at North Wall Cut in Half, 16 Panel Cut to Fit 47 inches inches inches = =192 B. STEP 2 CLEAN AND SEAL Before the installation of access floor is carried out, a general clean of the sub floor is carried out, followed by sealing the sub floor with a synthetic polymer. The purpose of the synthetic polymer is to trap the concrete dust of the sub floor C. STEP 3 -LOADING PRODUCT ONTO FLOOR Loading of the product onto the sub floor is a procedure that requires the even distribution of the materials onto the sub floor before any access floor and or other trade works can commence. This is very important as it firstly allows the product to be ready and handy during installations. Secondly preloading the product does not interfere or damage any cabling/duct/ hydraulic works. Note: 1 Pallet = 1655 lb, 1 pallet = 200 sq/ft

4 D. STEP 4 INSTALLATION OF ACCESS FLOOR 1 STARTING LINE After confirming the elevation of the installation with the General Contractor, the first section of flooring called the STARTING LINE is ready to be installed. At the starting point established on the subfloor, the first pedestal is accurately centred and permanently anchored using adhesive. Place additional pedestals at 24 intervals along the starting lines so that a 4 panel wide section of flooring can be built. The starting line should span across the longest length of the sub floor. NOTE: the starting line of the access floor must always be parallel to the lift core section, if there is no lift core, the starting line must be parallel to the façade. 2 WRAPPING AROUND THE CORE After the starting line has been installed, the second phase of the floor can be installed. This second phase is called wrapping around the core, which effectively means installing a perimeter barrier that is 4 panels wide (this is the same width as the starting line) off the starting line. 3 CORE PERIMETER INFILL Once the perimeter barrier has been installed (wrapping around the core) the next step is to infill the perimeter if the core area, as the walls contribute much stability to the floor. These panels must be custom-cut to fit at the job site, if the layout does not permit use of full panels. Measurements for cut panels should be taken and transferred to the panels carefully. Panels should be double-checked before they are cut it s easy to mistakenly make a mirror image cut. Pedestals used to support cut panels at the wall must be placed as close to the walls as possible to avoid a situation where the panel overhangs the pedestal and could tip up if loaded. Pedestal distance from the wall must never exceed 2 from centreline of pedestal to wall. 4 INSTALL THE REMAINING OF THE ACCESS FLOOR TO GENERAL AREA Continue installing the bulk of the access floor, by firstly filling around the perimeter core first (moving away from the starting line, and then continuing below the starting line. If the panel rocks diagonally when placed on its pedestal, turn it onequarter and check it again. If the panel continues to rock when rotated, some debris may be in between the panel bottom and the pedestal head. Check the mating surface for dirt and at the same time, check to make sure the pedestal is not tilted. If the panel still rocks, set it aside to be used as a perimeter cut panel or for use of round columns, curbs and other such obstructions. A pedestal should not be adjusted, even slightly, unless the neighbouring panels resting on it also rocks. If this happens, either the

5 pedestal was not properly adjusted initially or something has disturbed its adjustment. If rocking panels become commonplace, it is likely the pedestals were not adjusted properly at the beginning of the installation. DO NOT start compensating for rocking panels by making minor adjustments to succeeding pedestals as this will start a progression of adjustments and as a result, the floor will begin to rise or fall in height. Do not be trapped into thinking these minor adjustments will correct the problem; they will only make the problem worse. Go back and correct the problem at its source, regardless of what it is. While building the floor, no one should be allowed on the finished floor particularly before the adhesive has set. As the access floor belongs to the dealer and his representative, the installer should be watchful for abuse by other trades, as this abuse will have to be repaired by the installer. In case of abuse, the installer should seek area by area sign off by the general contractor. Until area is signed off by the general contractor, the installer should maintain control and prohibit the removal of panels by other trades. Correct procedures for moving material or equipment across the floor and how to remove or replace panels is provided at the end of this section. This sheet should be copied and provided to other trades through the general contractor. It is also suitable for providing to the owner for his use after his building is complete. 5 CUT AND INFILL THE PERIMETER PANELS Perimeter panels close in space between the access floor, walls and any columns or obstructions. These panels must be custom-cut to fit at the job site, if the layout does not permit use of full panels. Measurements for cut panels should be taken and transferred to the panels carefully. Panels should be double-checked before they are cut it s easy to mistakenly make a mirror image cut. Pedestals used to support cut panels at the wall must be placed as close to the walls as possible to avoid a situation where the panel overhangs the pedestal and could tip up if loaded. Pedestal distance from the wall must never exceed 2 from centreline of pedestal to wall. NOTE: Please refer to pedestal drawing in section 3- Core Perimeter Infill 1.3 INSTALLATION PROCESS LOCALISED AREA A. Measure the room to determine the quantity of panels and cuts required. B. Mark out the floor area to determine the location of pedestals and cut panels as required. C. Depending on the size of the room, there are 2 ways of starting the application of the access floor grid:

6 Option A In a room with a floor layout that is not square in nature with perimeter walls that aren t straight: Starting panel should be placed in the centre of the floor to obtain height and level should be set using this panel to be used as a datum for the other panels. Option B In a room with a square floor layout and perimeter walls that are straight (this method not recommended above 250 ft/sq): Starting panel should be placed in the corner. If it was found this panel was a cut panel in Step 1 then use this cut panel. Height and level should be set using this panel to be used as a datum for the other panels. D. When panels are placed in position, panel level should be checked and adjusted using the height adjustable pedestals in order to obtain the desired finished floor height and level. Option A In a room with a floor layout that is not square in nature with perimeter walls that aren t straight: Panels should be laid out in 2 rows to begin with across the length of the room. This makes it easier to have more crews working on the one floor at once from different ends of the floor Option B In a room with a square floor layout and perimeter walls that are straight (this method not recommended above 250 ft/sq): Perimeter panels should be installed first and floor will extend outwards in a pyramid style. Thus keeping floor heights and levels even between all sections.

7 E. Floor is completed. Check the squareness and level of the floor. Make any necessary adjustments when required. 1.4 GENERAL NOTES A. PEDESTAL ADHESIVE SNA Access Floors Pty Ltd adhesive allows the pedestal to be repositioned within a few hours of use. Never adhere more pedestals than you can use in a shift. B. PROPER PEDESTAL ADJUSTMENT Make sure that the dimple of the locking collar is engage with the notch in adjustment nut. If not properly engaged slight loss of level resulting in rocking panels will occur. C. TILTED PEDESTALS Make sure that all pedestals are vertical (plumb). An uneven floor will result. Pedestals initially set plumb can become tilted until adhesive sets up so avoid pushing or walking on the floor areas where adhesive remains overlay pliable. Should the condition occur, a slight tap with a hammer will move the base until the uneven edges are eliminated but this must be done before adhesive sets. Uneven Edges Tilted Pedestals Tap Lightly Until Panels Even D. LEVELLING When using a lazer level, always take your elevation reference plan from the centre of the beam. Sighting to the top bottom of the beam may cause inaccuracies on large installations. Always take the level reading off the same location of the pedestal and be sure all workers are using the same reference point. E. FINISHED SIZE The access floor panel is the determining factor in spacing and is used as a gauge for the installation. Never adhere pedestals or install grid beyond the panels that can be placed in a day s work. Panels are to be installed snug to each other but should not exceed pressure sufficient to move an adjacent panel.

8 F. REQUIRED INSTALLATION CONDITIONS Conditions on site for storage of components and where installation is to proceed should be dry, watertight, free from standing water and sufficiently ventilated to ensure there are no excessive variations in temperature and humidity. The acceptable range is 30% / 5 C to 75% / 35 C.

9 2. MAINTENANCE PROCEDURES Access floors are an established element in modern buildings providing easy distribution and concealment of services. As workspaces invariably grow or change in layout, access flooring makes the reticulation of services much more flexible. These simple, basic handling and maintenance instructions have been prepared to help the building owner, the Builder, Tenant or User, to look after the access flooring, so that it continues to meet the original design criteria. 2.1 LIFTING OF HPL ACCESS FLOOR PANELS Access Floors are designed for panels to be lifted either vertically or with a hinged action using the suction lifting devices provided. Do not remove panels with a screwdriver and panels once removed should be replaced as soon as possible. When underfloor access is required, all panels, whether full or perimeter cut panels should be placed directly alongside where they came from and positioned in the same direction. This helps when re-instating the floor panels. Only the minimum number of panels should be lifted at any one time. More than one row of panels or large area of floor should not be removed simultaneously. Islands of panels or visible groups of pedestals should be avoided, especially when moving equipment around on top of the floor. Step 1 Remove screws from panel Step 2 Remove Stringers from Gaskets and Remove Screws to remove stinger if required Step 3 Remove panels required - Please note SNA advised that a maximum of 3 panels are to be lifted in a sequence, with the 4 th panel left intact

10 2.2 REPLACEMENT OF HPL ACCESS FLOOR PANELS Any dust on the pedestal heads or stringers should be removed, preferably by vacuuming, before panels are replaced. To replace panels, they should be aligned on the pedestal heads and gently lowered into position using a hinged action. A small amount of foot pressure maybe used to firmly seat a panel in position. Panels should not be kicked into place, jumped on or hammered into position. If a panel is not sitting correctly, there is probably some debris on one of the pedestal heads or stringers. Step 1 Replace stinger and screw into pedestal head Step 2 Any dust on the pedestal heads or stringers should be removed, preferably by vacuuming, before panels are replaced. Replace stringer gasket onto stringer. It is essential this gasket is located in the right position prior to replacing panel. Step 3 Replace Panels Using Vertical Motion. Ensure panels are correctly lined up and sitting in position. If a panel is not sitting correctly, there is probably some debris on one of the pedestal heads or stringers, remove panel, and vacuum away and debris. Then re-install panel accordingly 2.3 MOVING HEAVY EQUIPMENT ACROOS THE FLOOR Heavy building or office loads, eg. Chubb style fire safes should be manoeuvred into position over plywood or aluminium spreader plates and all nearby panels should be replaced in the floor, before the load is moved. All care should be taken, not to apply shock impact loads to an access floor.

11 2.4 HEIGHT ADJUSTMENT If panels rock when apparently seated correctly, it is possible to adjust the floor by releasing the locknut on the screw pedestal, the one that is loose or noisy and turning the height adjusting nut, one quarter turn at a time, then re-trying the panel. There is no other User mechanical maintenance of the system, as installed. If more significant attention than the above is required, then please contact SNA Access Floors LLC. 2.5 CLEANING OF PANEL SURFACE COVERING Special Access Flooring Grade High Pressure Laminates: 1. It is advisable to use tack mats at entrances to computer and clean rooms to avoid abrasive dust being walked in from adjacent areas. 2. To protect the high pressure laminate walking surface, regularly clean with a vacuum cleaner. 3. From time to time, damp mop with a mild detergent. Do not flood the floor with water or use harsh cleaning agents. Stubborn stains and scuff marks can be spot cleaned with a standard household cleaner in an undiluted solution, for example Mr Muscle surface spray (not the oven cleaner) or Acetone are good spot cleaners. 4. Do not clean with a dry mop that is saturated with oils or chemicals as any film on laminated surface will affect the static dispersion properties. 5. Do not clean the laminate with steel wool, nylon pads or abrasives of any kind, manually or with power equipment. 6. Definitely do not buff, wax or polish a laminate finished floor. It is unnecessary and will reduce the antistatic qualities of the floor system.