CEILING SYSTEMS CI/SfB (35) Xy [ Between us, ideas become reality. ] September 2005 FLAT Technical Guide CURVED
Index Page FEATURES and BENEFITS 1 COMPONENTS 2 Main Runners Cross Tees Perimeter Treatment ACCESSORIES 3 SUSPENDED DRYWALL GRID SYSTEM DETAIL 4-7 HANGING and FRAMING 8 ESTIMATING MATERIAL 9 CURVED MAIN RUNNERS 10 11 ARCHES and BARREL VAULTS 12 13 DOMES 14 17 CREATING AN ELLIPSE 18 19 RADIUS CHART 20 ESTIMATING MATERIAL 21
Features and benefits Key Attributes Peakform Patented profile increases strength and stability for improved performance during installation Superlock Main runner clip is engineered for a strong secure connection and fast accurate alignment confirmed with an audible click; easy to remove and relocate Screwstop Reverse hem prevents screw spin off on 38mm wide face 38mm wide face Main runners and cross tees - easy installation of screw applied Gypsum board Rotary stitched For additional torsional strength and stability Fire rating Armstrong have an ongoing fire testing programme. Please contact Internal Technical Sales Group for most recent structural fire tests Wind uplift Construction available, please contact Internal Technical Sales Group for detailed information Physical Data Material Hot dipped galvanised steel Surface Finish Unpainted steel Main Runner / Cross Tee Interface Joggled ends End Detail Main Runner : staked-on Superlock clip Cross Tee : staked-on XL 2 clip ASTM C635-04 Standard specification for the manufacture, performance and testing of metal suspension systems ASTM C645-04 Standard specification for nonstructural steel framing members ASTM E8-04 Standard test method for tension testing for metallic materials ASTM A-653 Standard specification for steel sheet, zinccoated (galvanised) or zinc-iron alloy-coated (galvannealed) by the hot-dip process 1
Components Item Nr. Dimensions Content / Carton Weight / Carton Cartons / Pallet length (mm) height(mm) width(mm) pcs Im kg Main Runner BP 7940 3600 38 38 12 43.20 20 36 43 Faceted Main Runners BP HD 8906 F08 3658 (144") 43 38 12 43.92 22 24 BP HD 8906 F16 3658 (144") 43 38 12 43.92 22 24 Cross Tees BP 7930 1200 38 38 36 43.20 20 48 BP 7920 600 38 38 36 21.60 10 96 19 19 40 32 Unhemmed C Channel BP 7838 3048 (120") 40 20 60.96 16 32 32 Knurled Angle Trim BP KAM 12 3658 (12') 32 32 30 109.72 26 12 32 Section Drawings Main Runner Length BP 7940 3600mm 75mm 23 x 150m 3600mm 75mm Faceted Main Runner faceted at 203mm (8") centres. Use for radius 4.50m or less BP HD 8906 F08 (54 slots) 3658mm 203mm (8") 3658mm (144") faceted at 406mm (16") centres. Use for radius over 4.50m (directional main runner) BP HD 8906 F16 (45 slots) 3658mm 102mm (4") 406mm (16 ) 3658mm (144") 305mm (12") Cross Tees 500mm 500mm BP 7930 1200mm 600mm 1200mm BP 7920 600mm 600mm 2 All sizes are nominal.
Accessories A variety of drywall grid accessories are available to provide problem solving solutions that save time, labour and money. Item Nr. Description Perspective Application BP DWACS Drywall Attachment Clip facilitates transition from drywall to acoustical ceiling; locks under bulb of grid section to prevent upward movement and provide secure attachment surface on one side of exposed grid. 30 45 BP DW30C BP DW45C 30, 45, 60 and 90 degree Drywall Angle Clips are used to create positive and secure angles for drywall and ceiling 60 90 BP DW60C installations on either main runners or cross tees. BP DW90C BP RC2 Radius Clip is used for drywall applications which form curved installations; attaches to the web of the main runner with four 10 mm pan head screws; install at all knockout locations. BP MBAC Main Runner Adapter Clip attaches to web of grid section, provides larger surface for screw attachment; used as a hold-down clip for thin material (metal or plastic lay-in panels); fastens drywall track to underside of exposed grid with lay-in panels, leaving grid face free of screw holes. BP MBSC2 Main Runner Spacer Clip (50mm in length) used to space two parallel main runners at 50 centres for air supply or return. BP XTAC Cross Tee Adapter Clip used to attach field cut cross tees to main runners. BP DLCC Direct Load Ceiling Clip to hang suspension system below existing 24mm grid face, transferring weight directly to hanger wire; may be used to preserve the fire rating of an existing ceiling to support heavy accessories. BP DWC Drywall Clip allows for a "second" ceiling to be installed below a drywall ceiling; attach through installed drywall to supporting structure. Please contact Internal Technical Sales Group for detailed information 3
Suspended drywall grid system detail 450mm 450mm Hanger wire or suspension angle 450mm Gypsum board 600mm 1 Butt joint 5 Modular lighting Twist to lock end of clip in slot Main runner Main runner 1200mm 1200mm 1200mm BP XTAC 9 Securing a single cross tee 4 All sizes are nominal.
Suspended drywall grid system detail Hanger BP MBSC2 wire or suspension angle Hanger wire or suspension angle Armstrong drywall main runner Drywall screws 2 Armstrong drywall cross tee Edge bead Expansion joint (by others) Screw 3 Expansion joint Cross tee Cross tee Main runner BP MBSC2 Main runner spacer clip Wood trim Control joint 4 Wood trim Control joint Access door (by others) 6 7 Spotlight fixture Hanger wire or suspension angle Hanger wire or suspension angle CChannel Access door BP DW90C BP DW45C BP DW60C BP DW30C Wall angle Steel stud 10 8 Vertical brace Channel and angle trim Suitable suspension hangers must be used and spaced as required to support load (dependent upon Gypsum board construction). Steel stud 11 Angle clip Please contact Internal Technical Sales Group for detailed information 5
Suspended drywall grid system detail 450mm 450mm 8 450mm 600mm 12 Triple layer with security lath Hanger wire or suspension angle Exposed Tee Grid System Drywall cross tee Wall angle Steel stud Acoustical panel Gypsum board 16 Transition Exposed Tee Grid System 1200mm 1200mm 1200mm Drywall Grid System Gypsum board 18 Drywall vertical 6 All sizes are nominal.
Suspended drywall grid system detail BP DWC clip 13 Double layer with security lath 14 Main runner stabiliser 15 Double hung ceiling Drywall Grid System AXIOM Profile 15mm Gypsum board BPA 339 AXIOM Universal T-bar connector clip BPT 2229 AXIOM Profile plasterboard trim AXIOM Profile BPA 339 BPA 339 BPT 2229 BPT 3225 A AXIOM Transitions plasterboard perimeter trim 17 AXIOM perimeter trim Hanger wire or suspension angle Hanger wire or suspension angle Main runner Sound isolator (by others) Hanger wire or suspension angle Gypsum board Additional hangers may be required to support load Surface mount light fixture (screwed to main runner) Plywood or Gypsum board Gypsum board 19 Alternative finishes 20 Surface mounted fixture 21 Triple layer with surface sound isolators Suitable suspension hangers must be used and spaced as required to support load (dependent upon Gypsum board construction). Please contact Internal Technical Sales Group for detailed information 7
Hanging and framing Suitable suspension hangers must be used and spaced as required to support load (dependent upon Gypsum board construction). Counter splayed wires Objects in the plenum may obstruct placement of vertical hanger wires and require splayed wires to support the load. When this occurs, a second counter splayed wire must be added. Install counter splayed wires at an angle equal and opposite the first wire, but not greater than 45 from vertical. The load capacity of the main runner remains unchanged. Not greater than 45 from vertical. 8 All sizes are nominal.
Estimating material Item Nr. Description Dimensions Content / Carton Weight / Carton Area of ceiling completed by one carton length (mm) pcs lm kg at 600mm centres at 1200mm centres BP 7940 Main runner 3600 12 43.20 20 27 m 2 54 m 2 at 450mm centres at 600mm centres BP 7930 Cross tee 1200 36 43.20 20 18 m 2 27 m 2 BP 7920 Cross tee 600 36 21.60 10 Item Nr. Description Dimensions Content / Carton Weight / Carton length (mm) pcs Im kg BP 7838 Unhemmed 3048 (120") 20 60.96 16 C-channel BP KAM 12 Knurled Angle Trim 3658 (12') 30 109.72 26 Ratio for Cartons and Pallets Cross tees at 600mm centres Cross tees at 450mm centres 1:2 for every one carton / pallet 1:3 for every one carton / pallet of mains, you will need two of mains, you will need three cartons / pallets of tees. cartons / pallet of tees. All sizes are nominal. Please contact Internal Technical Sales Group for detailed information 9
Curved main runner Creating curved framing for drywall is easy and offers unlimited possibilities. Custom radii to suit any design installation You control the curve Not limited to a pre-selected or pre-determined curved radius Full range of clips and accessories make installation easier than bending stud and track BP RC2 Clip Radius and drywall thickness will determine on centre spacing of cuts. Refer to Establishing an Arc on page 11 for creating a curved template. 203mm (8 ) Install BP RC2 Clip using 4 screws per clip. BP RC2 Clip is used to secure the main runner at the desired angle in curved ceiling with slot for installing cross tees. Refer to Making a template on page 11. BP RC2 clip must be installed on all knockout locations when used to frame a flat or curved ceiling. BP RC2 Clip Cross tee BP RC2 Clip Cross tee Cross tee When installing a vault, cross tees should be placed between BP RC2 clips When installing a vault, cr RC2 clips. When installing a valley, cross tees should be placed at the BP RC2 clips 10 All sizes are nominal.
1.4cm 5.6cm 12.6cm Curved main runner D Establishing an arc 1. Establish a centre line 2. Mark 60cm increments on line perpendicular to centre line 3. At 60cm marks, identify points of arc below perpendicular line (maintain consistent spacing of point). See radius charts on page 20. 4. Connect points to form a smooth arc Example: 12.9 m using chart on page 20. 60cm 60cm 60cm 60cm 22.5cm Location of first row at centre line Completing the template 1. Draw radius on template. 2 Cut along the radius and remove section of template 3. Cut main runner as required and position along the cut radius on the template (use the chart below) 4. Screw BP RC2 clips to faceted main runner at all knockout locations * 5. On the template, mark a slot location reference point to maintain consistent slot location Main runner Template under main runner * BP RC2 Clip placement Vaults - Cross tee placement in slots between cuts Valleys - Cross tee lock into slot on BP RC2 clip (tight radius installations may require bending up of the flange at ends of cross tees) Radius Up to 4.5m Over 4.5m Component BP HD8906 F08 BP HD8906 F16 Cut main runner(s) to fit the template Cut Radius of vault plus thickness of Gypsum board (can be partial radius of large spans) Cut Span of vault Please contact IInternal Technical Sales Group for detailed information 11
Arches and barrel vaults Contractors efficiency and understanding of the suspended grid system construction provides performance benefits and cost savings. An unlimited range of vaults and valleys can be constructed using faceted main runners made on the job to meet design needs Single and multiple curved ceilings can be framed quickly and easily Working with vault 1. Suitable suspension hangers spaced along the main runners not more than 1200mm on centre (dependent upon Gypsum board construction). 2. Add vertical braces as required to stabilize the frame. 3. Thickness of the sheeting material is determined by its plasticity. (Refer to supplying manufacturer's recommendation). 4. For vaults, suitable suspension hangers spaced along the main runners not more than 1200mm on centre (dependent upon Gypsum board construction). Angle and channel trim is used to frame the ends of the structure. Hanger wire or suspension angle 12 All sizes are nominal.
Arches and barrel vaults D Barrel vault Hanger wire or suspension angle Vertical brace Main runner Cross tee Vault perimeter light cove Floating vault Track or perimeter channel Hanger wire or suspension angle 200mm BP DW90C Main runner BP RC2 Drywall ceiling with Axiom light cove Hanger wire or suspension angle BP DLCC Drywall Grid System AXIOM Profile Gypsum board BPA 344 Light fixtures (by others) Drywall Grid System AXIOM Profile 15mm Gypsum board Exposed Tee Grid inverted and screwed in place to support light fixture BPT 2229 AXIOM Profile plasterboard trim Please contact Internal Technical Sales Group for detailed information 13
Domes Domes, like arches, have many variable characteristics that make each design unique. With a suspended drywall grid system, you can easily create the desired look of domes ranging from simple to complex. Vertical brace Hanger wire or suspension angle spaced as required Sheet metal Main runner Cut and screw cross tee Cross tee Main runner Working with domes 1. Determine the starting point at the top and bottom of the dome. 2. Prepare a sheet metal disk for the top of the dome. The disk should be 300 to 600 mm in diameter and should be fabricated from steel of suitable thickness. Note that the centre of the dome may need to be open to receive an electrical box, pole, or some other architectural detail. Refer to Options for top of domes on page 15. 3. Prepare a ring for the base of the dome from rolled angle or channel. 4. Attach curved main runners to the disk at the top of the dome and to the ring at the bottom. 5. Mains should be spaced no greater than 1200mm on centre (measured at the bottom ring). 6. Use cross tees cut to the appropriate length and screwed to the flange of the main runners to complete the dome frame structure. 7. Cross tees are not required near the top of the dome when the space between mains becomes less than 400mm. 8. The boarding must be cut into pie shaped sections and screw attached to the framework. 14 All sizes are nominal.
Options for top of domes D Vertical brace Folded plate dome Sheet metal disc positive attachment top (by others) Electrical chain Sheet metal disc with hole (by others) Cone Sheet metal disc (by others) Electrical box Sheet metal disc with electrical box in centre (by others) Light fixture Threaded rods (by others) Self supporting tee top Pan head screw Pan head screw Please contact Internal Technical Sales Group for detailed information 15
Domes Dome with Skylight Typical details Hanger wire or suspension angle 1200mm centres Radius Gypsum board Radius Gypsum board BP RC2 Radius clips Main runner (BP HD8906 F08) Main runner Curved angle trim Gypsum board Main runner both sides of panels Minimum bending points should be obtained from the supplying Gypsum manufacturer's recommendations. 16 All sizes are nominal.
Options for top of domes D Multi-Level Dome Egg or Elliptical Dome C L Saucer Dome Up C L C L Pole Dome Saucer Dome Down C L C L Saucer Dome Step Up Dome Offset 2 way Radius Dome Column ring made from a metal angle Checker Board Dome (step down) C L Please contact Internal Technical Sales Group for detailed information 17
Creating an ellipse Determining radius from rise to run Creating elliptical domes Rise Radius NOTE: The result of this construction technique creates an approximation of a true elliptical dome. 1. Establish two centre lines in the ellipse (lines A-B and C-D in figure 1). Example: Rise is 50cm Run is 400cm : 2 2 ((1/2 x Run) Rise) + Rise Run = Radius of circle that segment is taken from Figure 1 Radius 1 P 1/2 Room width D Run 1 Rise 1 Height A E C F B Room width 200cm 425cm 1/2 of 400cm = 200cm 200 2 ( ) + 50 50 = Radius 2 2 200 = 40000 (40000/50) + 50 = 2 850 = 2 Radius = 425cm 50cm 400cm 2. Determine the radius of the arc along axis C-D, using the formula below. (Rise 1 calculation). Using the formula on the left to calculate the radius, use rise 1 and run values calculated. Rise 1 calculation 2 2 Run 1 = ( 1/2 x room width) Height x 2 2 P = Height 1/2 Room width Rise 1 = Height P Use Radius calculation 3. Shape one main runner to form radius 1. 4. Install radius main runner at the C-D centre line of the ellipse with wire and strut to stabilise placement. 5. Determine the radius of the arc along axis A-B, using the formula below Figure 2 (Rise 2 calculation). Use the formula on the left to calculate the radius using rise 2 and calculated run values. Example: Radius = 300cm 240cm 180cm 120cm 60cm 6cm 60cm 6cm 120cm 180cm 240cm 60cm 25cm 25cm 60cm 120cm 120cm 18
Creating an ellipse Figure 2 D Radius 2 P Radius 2 1/2 Room width A E C F B Rise 2 Run 1 Room width Rise 2 calculation Rise 2 = 1/2 Room width 1/2 Run 1 Run 2 = 2P Use Radius calculation 6. Shape a main runner to form radius 2, positioning a slot hole at top centre. Cut through the slot hole at top centre, creating two ribs. Attach the ribs to the first main runner (C-D) with screws. 7. Repeat ribs on both sides on the C-D main runner, working from centre outwards every 600mm. Always start with the cut slot hole at top centre. Cut main runners at edge of ellipse. 8. Install 600mm cross tees, every 400mm working from top to the outer edge of the ellipse. Example: Height = 150cm Room width = 500cm Rise 1 calculation 2 2 Run = (1/2 x 500) 150 x 2 = 400 2 150 P = = 90 1/2 x 500 Rise 1 = 150 90 = 60 Radius = (1/2 x 400) 2 + 60 60 = 363 2 Rise 2 calculation Rise 2 = 1/2 x 500 1/2 x 400 = 50 Run = 2 x 90 = 180 (1/2 x 180) Radius = 2 + 50 50 = 106 2 Proceed with layout on floor according to the following: Let a line A-B signify the run and C-D signify the rise. With D as a centre, depict a line of a radius equal to half the run, scribe an arc, intersecting the run at E and F. Tie a fine wire to a nail driven partially in the floor at E, run it around the nail at D and tie it to the nail at F. Pull nail out at D, insert pencil in its place and trace the arch D-A and D-B completing the arc. Main runners Strut Cut and screw same radius main runner from centre to edge of dome at 600mm centre. Cross tees Please contact Internal Technical Sales Group for detailed information 19
Radius in metric Radius dimension in cm 60cm increments from centre line 300 330 360 390 420 450 480 510 540 570 600 630 660 690 720 60 6 5.5 5 4.6 4.3 4 3.8 3.5 3.3 3.2 3 2.9 2.7 2.6 2.5 120 25 22.6 20.6 18.9 17.5 16.3 15.2 14.3 13.5 12.8 12.1 11.5 11 10.5 10.1 180 60 53.4 48.2 44 40.5 37.6 35 32.8 30.9 29.2 27.6 26.3 25 23.9 22.9 240 120 103.5 91.7 82.6 75.3 69.3 64.3 60 56.3 53 50.1 47.5 45.2 43.1 41.2 750 780 810 840 870 900 930 960 990 1020 1050 1080 1110 1140 1170 60 2.4 2.3 2.2 2.1 2.1 2 1.9 1.9 1.8 1.8 1.7 1.7 1.6 1.6 1.5 120 9.7 9.3 8.9 8.6 8.3 8 7.8 7.5 7.3 7.1 6.9 6.7 6.5 6.3 6.2 180 21.9 21.1 20.3 19.5 18.8 18.2 17.6 17 16.5 16 15.5 15.1 14.7 14.3 13.9 240 39.4 37.8 36.4 35 33.8 32.6 31.5 30.5 29.5 28.6 27.8 27 26.3 25.5 24.9 1200 1230 1260 1290 1320 1350 1380 1410 1440 1470 1500 1530 1560 1590 1620 60 1.5 1.5 1.4 1.4 1.4 1.3 1.3 1.3 1.3 1.2 1.2 1.2 1.2 1.1 1.1 120 6 5.9 5.7 5.6 5.5 5.3 5.2 5.1 5 4.9 4.8 4.7 4.6 4.5 4.5 180 13.6 13.2 12.9 12.6 12.3 12.1 11.8 11.5 11.3 11.1 10.8 10.6 10.4 10.2 10 240 24.2 23.6 23.1 22.5 22 21.5 21 20.6 20.1 19.7 19.3 18.9 18.6 18.2 17.9 1650 1680 1710 1740 1770 1800 1830 1860 1890 1920 1950 1980 2010 2040 2070 60 1.1 1.1 1.1 1 1 1 1 1 1 0.9 0.9 0.9 0.9 0.9 0.9 120 4.4 4.3 4.2 4.1 4.1 4 3.9 3.9 3.8 3.8 3.7 3.6 3.6 3.5 3.5 180 9.8 9.7 9.5 9.3 9.2 9 8.9 8.7 8.6 8.5 8.3 8.2 8.1 8 7.8 240 17.5 17.2 16.9 16.6 16.3 16.1 15.8 15.5 15.3 15.1 14.8 14.6 14.4 14.2 14 2100 2130 2160 2190 2220 2250 2280 2310 2340 2370 2400 2430 2460 2490 2520 60 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.7 0.7 0.7 0.7 120 3.4 3.4 3.3 3.3 3.2 3.2 3.2 3.1 3.1 3 3 3 2.9 2.9 2.9 180 7.7 7.6 7.5 7.4 7.3 7.2 7.1 7 6.9 6.8 6.8 6.7 6.6 6.5 6.4 240 13.8 13.6 13.4 13.2 13 12.8 12.7 12.5 12.3 12.2 12 11.9 11.7 11.6 11.5 2550 2580 2610 2640 2670 2700 2730 2760 2790 2820 2850 2880 2910 2940 2970 60 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.6 0.6 0.6 0.6 0.6 0.6 0.6 120 2.8 2.8 2.8 2.7 2.7 2.7 2.6 2.6 2.6 2.6 2.5 2.5 2.5 2.5 2.4 180 6.4 6.3 6.2 6.1 6.1 6 5.9 5.9 5.8 5.8 5.7 5.6 5.6 5.5 5.5 240 11.3 11.2 11.1 10.9 10.8 10.7 10.6 10.5 10.3 10.2 10.1 10 9.9 9.8 9.7 3000 3030 3060 3090 3120 3150 3180 3210 3240 3270 3300 3330 3360 3390 3420 60 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.5 0.5 0.5 0.5 0.5 120 2.4 2.4 2.4 2.3 2.3 2.3 2.3 2.2 2.2 2.2 2.2 2.2 2.1 2.1 2.1 180 5.4 5.4 5.3 5.2 5.2 5.1 5.1 5.1 5 5 4.9 4.9 4.8 4.8 4.7 240 9.6 9.5 9.4 9.3 9.2 9.2 9.1 9 8.9 8.8 8.7 8.7 8.6 8.5 8.4 3450 3480 3510 3540 3570 60 0.5 0.5 0.5 0.5 0.5 120 2.1 2.1 2.1 2 2 180 4.7 4.7 4.6 4.6 4.5 240 8.4 8.3 8.2 8.1 8.1 20 All sizes are nominal.
Estimating material Item Nr. Description Dimensions Content / Carton Weight / Carton Area of ceiling completed by one carton length (mm) pcs Im kg at 600mm centres at 1200mm centres BP HD8906 F08 / BP HD8906 F16 Main runner 3658 (144") 12 43.92 22 varies with radius at 450mm centres at 600mm centres BP 7930 Cross tee 1200mm 36 43.20 20 18 m 2 27 m 2 BP 7920 Cross tee 600mm 36 21.60 10 Item Nr. Description Dimensions Content / Carton Weight / Carton length pcs Im kg BP 7838 Unhemmed 3048 (120") 20 60.96 16 C-channel BP KAM 12 Knurled 3658 (12') 30 109.72 26 Angle Trim Ratio for Cartons and Pallets Cross tees at 600mm centres Cross tees at 450mm centres 1:2 for every one carton / pallet 1:3 for every one carton / pallet of mains, you will need two of mains, you will need three cartons / pallets of tees. cartons / pallet of tees. All sizes are nominal. Please contact Internal Technical Sales Group for detailed information 21
Additional Drywall Grid Systems United Kingdom / Republic of Ireland Armstrong World Industries Ltd. Building Products Division Armstrong House, 38 Market Square, Uxbridge UB8 1NG 0800 371849 (UK) 1800 409002 (ROI) FREEFONE Fax: 00 44 (0) 1895 274287 www.armstrong-ceilings.co.uk e-mail: sales-support@armstrong.com Advisory note All photographic and design elements supplied in this brochure do not necessarily reflect any recommendation by any of the companies named in this brochure as to the proper use or recommended methods of installation of suspended ceilings and are supplied only as informative material. For technical reasons in printing, differences may appear between colours printed in this brochure and the actual product. The choice of colours should always be made from a sample of the product. All statements and technical information contained in this brochure, or any publication of the companies named in this brochure, relating to Armstrong ceilings are based on results obtained under laboratory test conditions. It is the responsibility of the user to verify with the seller of the products in writing that such statements and information are appropriate to the specific use intended. Sales of the products and liability of the selling companies are in accordance with the terms and conditions of sale of the selling company. All product specifications are subject to modifications without prior notice. Job No. 12436 Produced by The Design Quorum, Gerrards Cross, Bucks UK. Tel: 01753 891707 PG 2503 Printed on chlorine free paper from sustainable resources