Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G1/00—Scaffolds primarily resting on the ground
  • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
  • E04G1/152—Platforms made of metal or with metal-supporting frame
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G1/00—Scaffolds primarily resting on the ground
  • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms

Definitions

• the present invention concerns a scaffolding board comprising a section with a sub ⁇ stantially flat surface for persons staying upon this surface, and including a fitting with hooks at the end of the section, where the hooks are provided with downwards di- rected recesses for securing the assembled scaffolding board on a transverse beam, where the section extends approximately to the centre of the recess to cover half of the transverse beam when the scaffolding board is placed on the beam.
• the invention also concerns a method for mounting a scaffolding board.
• Scaffolding boards of metal, e.g. steel or aluminium, typically having a skid-proof board surface and hook fittings for fastening the board on a transverse beam are prior art.
• the hook fittings vary depending on the application.
• An example used primarily in USA is shown in Fig. 1, where the board is provided with a set of hooks in continua- tion of the board.
• These boards are characterised in that by laying/mounting of the boards in continuation of each other, a hole appears between the board over the trans ⁇ verse beam. This hole may act as a stumbling edge when walking over it, or as an ob ⁇ stacle when using e.g. a wheelbarrow.
• the system with hook fittings projecting out from the board is commonly known and used, as it has to be possible to take up a single board disposed in a row of at least three succeeding boards, without dismounting the remaining boards. It has previously been attempted to circumvent this problem by mounting a crossing board after mount ⁇ ing the scaffolding boards. This, however, is cumbersome and time-consuming, and requires extra components.
• the boards can be made in two versions with hooks that differ so that the interspaces are covered. Such a sys ⁇ tem with different types of hooks is, however, disadvantageous when a uniform pro ⁇ duction is wanted.
• the boards with the hooks shown on Fig. 1 are far from skid-proof, and an upstanding edge of the size of the material thickness plus the drawing height still remains.
• a scaffolding board that includes a section with a substan ⁇ tially flat surface for persons staying upon this surface, and including a fitting with hooks at the end of the section, where the hooks are provided with downwards di ⁇ rected recesses for securing the assembled scaffolding board on a transverse beam, where the section extends approximately to the centre of the recess for covering half of the transverse beam when the scaffolding board is placed on the beam, where the sec ⁇ tion extends approximately to the centre of the recess, e.g. a U-shaped recess, to cover half of the transverse beam when the scaffolding board is placed on the beam.
• the hooks are perma ⁇ nently mounted, particularly rotationally fixed, on the section.
• the scaffolding board according to the invention is much easier and cheaper to manufacture while at the same time easy to mount, safer in use and which does not entail holes between the boards disposed in continuation of each other.
• the transition between two succeeding boards is largely imperceptible.
• uniform ends of the boards are achieved, meaning that they may be laid or taken up from an arbitrary end.
• scaffolding boards in continuation of each other are provided so that two succeeding scaffolding boards are resting on the same transverse beam.
• the metal section extend approximately to the middle of the recess in order to cover half of the transverse beam, one is to provide that the section itself on a corresponding scaffold ⁇ ing board mounted in continuation does not prevent access of the hooks to the beam.
• the hooks are therefore designed so that they without rotation fit with their front edge into the interspace between the top side of the beam and the underside of the corre ⁇ sponding board mounted in continuation thereof. In practice, this means that the verti ⁇ cal height A of the front edge is less than the height of the interspace between the top side of the beam and the underside of the section on the board mounted on the trans- verse beam in continuation thereof.
• the hooks may furthermore advantageously be provided with a bevelled front edge in order to, by pushing the end of the board towards an end of an ⁇ other board disposed in continuation on a transverse beam, to get it sliding up the bev- elled front edge in order thereby to lift this other board for inserting the scaffolding board with the hooks on the transverse beam.
• a front edge may extend from the underside of the section and sloping down ⁇ wards in direction away from the section.
• Such a sloping front edge that lift the subsequent scaffolding board during mounting also enables the legs of the hook at each side of the transverse beam to be made so long that they extend to at least half of the diameter of the beam while simultaneously the distance of the centre of the transverse beam and the top side of the board may be kept within the relevant guidelines for scaffolding.
• Exactly the relation between the distance between the centre of the transverse beam and the top side of the board and the distance over which hooks are to extend downwards around the transverse beam sets up strict rules for the dimensions of the hooks of the board.
• the scaf ⁇ folding board according to the JP publication 2002 161636 mentioned in the introduc ⁇ tion with the rotatable hook does not comply with the guidelines used in USA, as the legs on the hooks do not extend far enough down on both sides of the transverse beam.
• the hook cannot be constructed in a simple way either with legs which are sufficiently long for that purpose, as elongation of the front leg on the hook will cause that prior to the mounting it will point away from the end of the subsequent board and no longer swing correctly forward during the mounting.
• the hooks on a board according to the invention may easily fit into the interspace between the transverse beam and the section on another board which is al ⁇ ready provided on the beam
• the hooks may be designed with a front leg and a rear leg to form the downwards directed recess with a distance B between the upper edge of the recess and the underside of the section, where the front leg has a front edge with a height A, which is less than B, and a sloping front edge extending from the underside of the section to the front edge.
• This sloping front edge can be a straight edge, but may also be curving.
• the scaffolding board has identical sets of hooks at both ends. In that way no allowance is to be made during mounting which end is to be disposed in con- tinuation of other boards already placed on the beam.
• the scaffolding board may have identical sets with two hooks, where one of the two hooks have a different distance to the closest side of the scaffolding board than the other hook. This entails that the hooks on scaffolding boards disposed in continuation of each other do not block each other.
• the hooks may typically be designed with a sub- stantially flat profile.
• the hooks may possibly be assembled in pairs with a transverse profile for reinforcing the profile in boards with small material thickness and for rapid positioning when mounting hooks on the board.
• the profile has e.g. a surface which is connected with L-shaped side members at a right angle to the surface in order thereby to constitute an edged C-section.
• Manufac ⁇ turing of such a scaffolding board is simple, as it can be made in long webs, e.g. by extrusion, and adapted to the correct length for scaffolding boards, succeeded by mounting hooks at the ends.
• the scaffolding boards may be provided with a pattern of holes and elevations to reduce weight, to prevent water from collecting on the section and to safeguard people walking on the scaffolding board against sliding on the surface.
• the invention primarily concerns a scaffolding board with hook fittings for the Ameri ⁇ can market - for substituting and improving prior art scaffolding boards on this market which put up other demands than e.g. the European market - but may naturally also be envisaged applied on other markets, particularly where American specifica ⁇ tions/standards are used.
• Fig. 1 shows scaffolding boards according to prior art
• Fig. 2 shows the ends of two scaffolding boards according to the invention
• Fig. 3 shows two ends of scaffolding boards assembled around a beam
• Fig. 4 shows a cross-section of Fig. 2
• Fig. 5 shows Fig. 3 in perspective view from below
• Fig. 6 shows the dimensions of the hooks in relation to the scaffolding boards.
• Fig. 1 On Fig. 1 is shown a draft of two scaffolding boards according to prior art, where the upper scaffolding board is provided with a kind of hooks, where the hole appearing when the boards are disposed in continuation of each other is not covered.
• the other board shown at the bottom of Fig. 1 it has been attempted to cover the hole ap ⁇ pearing between the boards when they are disposed in continuation of each other.
• these boards are very defective as they are not skid-proof in any way in rela ⁇ tion to the transverse beam, but on the contrary easily slide off the beam, entailing great hazard while staying on the board.
• Fig. 2 shows ends of scaffolding boards 1 according to the invention.
• the board 1 has a metal section 2, e.g. of steel or aluminium, with two downwards facing L-shaped sections as side members 3 for constituting substantially an overall and more or less C-shaped cross-section.
• scaffolding boards 1 are provided with holes 4 so that dust and rain do not collect on the surface of the section 2, where the holes 4 addi ⁇ tionally are raised and provided with relatively sharp edges in order to safeguard against skidding on the board.
• a set of hooks 5 engaging in over transverse scaffolding beams 7.
• the hooks 5 are provided with downwards directed recesses 8 for securing the entire scaffolding board 1 on a transverse beam 7.
• the section 2 extends approximately to the centre 9 of the recess 8 in order to cover half of the transverse beam 7 when the scaffolding board 1 is placed on the beam 7. This is more clearly seen on Fig. 3.
• the hooks 5 are provided a front edge 15 that fit into the inter ⁇ space between the top side of the transverse beam 7 and the underside of the section 2 on the subsequent on the transverse beam mounted board, the hooks 5 are provided with a sloping front edge 10.
• the end of the board 1 with the hooks 5 may thus be pushed in under the end of the other board 1', when this other board 1' is placed on a transverse beam 7. Due to this push, the second board 1' slides up the inserted front edge 10 and is thereby lifted sufficiently in order that the scaffolding board 1 with the hooks 5 may be pushed in over the transverse beam 7, however without lifting the other board 1' so much that the hooks 5 go free of the beam 7.
• Fig. 3 and Fig. 5 show two board ends 1, 1' in continuation of each other with the hooks 5 disposed on the transverse beam 7.
• Fig. 4 which is a cross- section of Fig. 2, the hooks 5, 5' at right and left sides, respectively, of the board 1 are staggered in relation to the closest side of the board. This entails that the hooks, when the boards are placed in continuation of each other, do not interfere.
• the hooks 5 may be designed with a front leg 13 and a rear leg 14 for forming the downwards directed recess 8 with a distance B between the upper edge 9 of the recess and the underside of the section 2, where the front leg 13 has a front edge 15 with a height that is less than B and a sloping or bevelled front edge 10 that extend from the underside of the section 1 to the front edge 13.
• a simple scaffolding board which does not have the disadvantages discussed in the introduction.
• a scaffolding board with hook fittings that close the hole between to succeeding boards and which simultaneously may be mounted and dismounted in an arbitrary sequence. The latter only requires that adjacent ends of two boards are to be lifted up, until one is free of the other. It has simple design, and only few resources are required during manufacture, e.g. by using extrusion, or edge or roll bending, of the section and subse ⁇ quent mounting of a simple plate-like hook fitting.
• the invention also provides for safety aspects, as not only the holes between the boards are covered, but a mutual locking of the hooks 5 is also achieved, as a board 1 in the shown embodiments cannot be dismounted without lifting the adjacent board 1'.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Mechanical Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Mutual Connection Of Rods And Tubes (AREA)
• Connection Of Plates (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=35385831

Family Applications (1)

Country Status (4)

Families Citing this family (5)

Family Cites Families (10)

• 2005
  • 2005-08-31 EP EP05777763A patent/EP1797256A1/de not_active Withdrawn
  • 2005-08-31 CA CA002577081A patent/CA2577081A1/en not_active Abandoned
  • 2005-08-31 US US11/661,742 patent/US20080164099A1/en not_active Abandoned
  • 2005-08-31 WO PCT/DK2005/000558 patent/WO2006024302A1/en not_active Ceased

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events