MANUAL - Lichtgitter GmbH

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Technical Terms Metal floors are grouped into two distinct categories, gratings (forge-welded and pressure-locked gratings) and perforated metal planks. Gratings consist of a plurality of vertically aligned flat bearing bars, held upright, apart and parallel to each other at regular spacing, by a plurality of cross bars fixed transversely into them, also at regular spacing. The arrangement of bars as described would normally provide a free space area, in excess of 70% of the plan area. 1. Bearing bars Bars bearing load lie parallel to each other between two grating supports 4. Mesh Clear distance between bearing bars and cross bars. 7. Length (bearing bar direction) External distance of a metal grating in bearing bar direction. This size is termed length even if less than the width. All cut edges are bound with either binding bar, kick flat (toeplate), or in some instances, deep bar. Pressure-locked gratings are bound on all sides, whereas forge-welded gratings are normally only bound at the ends of the loadbearing bars. Perforated metal planks are C-profiles formed from sheets with different formed patterns on their surfaces. These patterned profiles provide varying levels of serration on their top surfaces which in turn provides increased levels 2. Cross bars Connecting bars that are positioned transversely across bearing bars and are either welded or pressed into them at their intersection points to provide lateral restraint. 5. Pitch Distance between centre-to-centre of bearing bars and centre-to-centre of cross bars. 8. Width (cross bar direction) External distance of metal grating in cross bar direction. This size is termed width even if it is greater than the length. 8 of stability to the user. Gratings and perforated metal planks are light and easy to install. They are especially suitable for pedestrian and vehicle traffic on platforms, walkways, stairs, landings and stairtreads. They are lightweight, provide excellent light and air transmission, they have high strength and are easy to assemble and disassemble, whilst the serrated top surface ensures minimal collection of water and dust, i.e., all striking product advantages. 3. Binding Bar or section to the edge of gratings, flush with the tops of bearing bars (in direction of bearing bar = binding along side; cross to bearing bar = cross binding). 6. Perforated metal planks Perforated metal planks are produced by forming and perforating sheets. Depending on use, different patterns, widths and heights are possible. 9. Span (bearing bar direction) Distance between centre to centre of support. Clear span (effective span) is the clear distance between two supports.
10. Cutouts Straight or curved cutouts in metal gratings may be necessary to clear obstructions, plant or structural members. All cuts ends are bound after shaping. 13. Deep binding bar If an adjustment between height of grating and height of surrounding area is necessary, a deep binding bar is an option. Alternatively grating heights may be raised, by attaching other suitable sections to the underside. 16. Support A structural section having a minimum clear distance of 30 mm available, to allow a minimum of 25 mm of bearing for bearing bars. Deviations may be permitted, providing suitable measures are taken to prevent excessive movement in the direction of bearing bars. 19. Serration Forge-welded gratings are provided with a top surface that reduces the risk of slip in adverse conditions, by regular notching of bearing bars to produce serrations. 11. Small cutouts Straight or curved cutouts with a length of less than 0,5 rm. 14. Notch A cutout made to the lower part of bearing bars in order to reduce the level of the grating top to that of the surrounding area. A notched bearing bar should still be capable of sustaining the design load. 17. Side (end) plate Plates provided with holes for bolting, welded to the ends of bearing bars in treads. In order to increase the amount of serration and cover the transverse direction, pressure-locked gratings can also be supplied with serrated cross bars. 9 12. Kick flat (toe plate) Binding bar projecting above the top surface of bearing bars by at least 100 mm (upstand). 15. Substructure A structural unit provided beneath a grating that usually provides support. 18. Perforated nosing A visually accentuated member, perforated to provide serrations that reduce the risk of slip, which increases the load-carrying capability at its location and is welded to the leading edge of all treads and landings on stairs. Perforated metal planks are provided with a serrated top surface by their perforations. Technical Terms
Page 1: MANUAL
Page 4 and 5: Lichtgitter - Head Office Stadtlohn
Page 6 and 7: 6 A G I
Page 10 and 11: Service To us „Service“ means
Page 12 and 13: SP Forge-Welded Gratings Permanent
Page 14 and 15: SP Forge-Welded Gratings Forge-weld
Page 16 and 17: SP Load table for Forge-Welded Grat
Page 18 and 19: SP Standard Gratings All standard g
Page 20 and 21: SP P Square Gratings In accordance
Page 22 and 23: P Pressure-Locked Gratings Roughly
Page 24 and 25: P Pressure-Locked Gratings Pressure
Page 26 and 27: P Loadtable for Pressure-Locked Gra
Page 28 and 29: P Standard Gratings and stairtreads
Page 30 and 31: SP bearing bar dimension P Loadtabl
Page 32 and 33: SP P Fixings for Gratings Fixings a
Page 34 and 35: SP clamp clamp clamp P Fixings Hook
Page 36 and 37: P Façade gratings Lichtgitter faç
Page 38 and 39: P Convector Covers More and more ne
Page 40 and 41: Floor of an intermediate storage ha
Page 42 and 43: B Production Perforated Metal Plank
Page 44 and 45: BP-Ü BN-O Perforated metal planks,
Page 46 and 47: BP BR The table indicates the distr
Page 48 and 49: BP BR The table indicates distribut
Page 50 and 51: BN-G The table indicates distribute
Page 52 and 53: BZ The table indicates distributed
Page 54 and 55: BZ The table indicates distributed
Page 56 and 57: BP BR BZ Loadtable for concentrated
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B Treads Standard and tailor-made p
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B Fixings for Perforated Metal Plan
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BZ BP-Ü Adaptive elements at floor
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BP BR Protection panels made from p
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T Spiral Staircase „LG Standard
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T Spiral Staircase „LG Standard
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T Spiral Staircase „LG Special“
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T Spiral Staircase„LG Special“
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SP P B Serration Metal gratings hav
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SP P B Serration Test results of se
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Surface treatment The preferred sur
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SP P B Surface Treatment 1. Surface
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SP P B Tolerances Gratings and perf
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P Tolerances Tolerances (deformatio
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SP P B Static Load Calculations Spa
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SP Static Calculations Calculation
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Calculation example: Perforated met
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SP P B Production Production Produc
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SP Notes for invoice P Complete rec
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SP Enquiry-/Order Form P (Stamp of
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Main Works Stadtlohn Lichtgitter Ge
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Head Office Stadtlohn Lichtgitter G
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MANUAL - Lichtgitter GmbH

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