Roofing sheet-anchoring apparatus

Jan. 13, 1970 k.gobel 3,488,902

ROOFING SHEET-ANCHORING APPARATUS Filed May 1, 1968 ₂ Sheets-Sheet '1

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Attorney

3,488,902

K. GOBEL

ROOFING SHEET-ANCHORING apparatus

Jan. 13, 1970

Filed May 1, 1968

Sheets-Sheet 2

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3,488,902

Patented Jan. 13, 197C

United States Patent Office

3,488,902

ROOFING SHEET-ANCHORING APPARATUS Klaus Gobel, Zeughausstrasse 41, Trier, Germany

Continuation-in-part of applications Ser. No. 397,184, Sept. 17,1964, and Ser. No. 602,067, Dec. 15,1966. This application May 1, 1968, Ser. No. 725,866

Claims priority, application Germany, Dec. 6, 1963, G 39,338; Jan. 11, 1966, G 45,678

Int. Cl. E04b 7/00; E04d 13/00,13/14

U.S. CI. 52—94 12 Claims

ABSTRACT OF THE DISCLOSURE

A holder attached to roof sheathing secures an inner section and a complemental outer section. The inner and outer sections provide a space between them for receiving the edge of a roofing sheet formed into a reverse bend which includes first and second folds. The reverse bend may be upstanding above the general upper surface of the sheet and its first fold is inserted between a tongue and groove formed by the complemental sections which extend inwardly from the roof edge. The second fold of the bend is unrestrained, to be varied in size corresponding to the expansion or contraction of the sheet in response to temperature changes. Alternatively the marginal portion of the roofing sheet is supported a substantial distance above the roof and the return bend extends downwardly toward the roof with the first fold clamped between the tongue and groove portions of the complemental sections. The reverse bend of the roofing sheet edge and the portions of the complemental sections enclosing the roof edge prevent entry of water and wind between the roofing sheet edge and the roof sheathing.

This application is a continuation-in-part of the application of my U.S. Patent 3,381,425, for Protective Covering for Roof Edges, and my application Ser. No. 602,067, filed Dec. 15, 1966, now Patent No. 3,444,658, for Roof Sheet Anchoring Apparatus.

It has been a problem to attach roofing sheets satisfactorily and to protect roof edges adequately from penetration of moisture between the roofing sheets and the underlying roof sheathing, which moisture would cause deterioration of the sheathing. Therefore, it is a principal object to provide sheet-anchoring apparatus which will securely attach roofing sheets to the roof edges and prevent access of moisture to the space between such roofing sheets and the sheathing.

An additional problem associated with conventional application of roofing sheets by nailing them to sheathing is the tendency of the sheet edges to be moved relative to the sheathing caused by alternate contraction and expansion of the sheet material in response to temperature changes. Such relative movement pulls the sheet-holding nails out of the sheathing. Consequently, it is an important object to provide sheet-anchoring apparatus which permits movement of one sheet edge in response θθ to such temperature changes with a minimum of force being exerted on the opposite sheet edge which may be joined to another sheet and nailed to the sheathing in overlapping relationship in conventional manner. It is a paratus of the present invention and FIGURE 2 is a ver tical section through the apparatus as installed on a roof FIGURE 3 is a top perspective of a modified form o the sheet-anchoring apparatus and FIGURE 4 is a verti cal section through the apparatus installed on a roof.

FIGURE 5 is a vertical section through a differen form of the sheet-anchoring apparatus and FIGURES ( and 7 are vertical sections through complemental innei and outer sections of somewhat different forms than tha shown in FIGURE 5.

In the form of the sheet-anchoring apparatus shown ir FIGURES 1 and 2, an outer section 1 complementally fits over an inner section 2 and is snapped onto and hole by such inner section. The inner section has a supporting portion which slidably receives in its cavity the head 4 of the T-shaped holder 3 which can be fastened to roof sheathing R by nails or screws extending through slots 12. Teeth 5 in the supporting portion cavity of section 2 mesh with teeth 6 on opposite edge portions of head 4 for selectively adjusting the elevation of the inner section 2 corresponding to different structural characteristics of a roof edge.

The form of attaching apparatus shown in FIGURE 1 is especially suitable for roofs having relatively short horizontal extents so that inner section 2 can be slid conveniently longitudinally onto holder head 4 and held in constant elevational position by engagement of teeth 6 on opposite edge portions of the cross flanges 4 with selected teeth 5 on the adjacent inner surface of section 2. Such teeth are kept in mesh by engagement of the backing flanges 9 and 10 with the side of head 4 opposite the teeth 6. Outer section 1 also is installed by sliding it lengthwise parallel to the roof edge with its lower arm 19 engaged beneath the lower edge of section 2.

In the form shown in FIGURE 3, the fingers 9' and 10' snap over the edges of holder 3'. The holder is secured by nuts and bolts to an angle bracket 7 secured to roof sheathing R by screws extending through slots 11 and 12. Holder 3' can be adjusted vertically relative to bracket 7 by selective engagement on teeth 7' on the outer face of the upright flange of such bracket and teeth 8 on the adjacent face of the holder 3'. A slot 13 is provided in holder 3' to receive the bolt 13'. The upper section 1' snaps over the lower section and projection 22 on the lower edge of its upright supporting portion is received in rabbet 21 of section 2'.

The cantilever arms 17 of sections 1 and 1' in FIGURES 1 and 3 are return bent to form grooves into which extend the cantilever flat tongue 16 or 16' of section 2 or 2', respectively, such free ends being spaced apart to form a slot 18 for receiving the edge of a roof sheet therebetween. The margin of such roof sheet S is formed as an upstanding reverse bend, the first fold of which is received in slot 18 and extends over opposite sides of the tongue. The free margin of arm 17 forming one side of the groove is a flange extending into the second fold of the return bend. The edge of the sheet is bent slightly downward and is held between staggered projections or ribs 14 and 15 on sections 1 and 2, respectively.

Sufficient space is provided adjacent to the opening to slot 18 to accommodate the second fold of the reverse bend and to permit its flexure to compensate for contraction or expansion of sheet S in a direction perpendicular to the

-Ji . — . M in U uxx%/vuxvrii p^ipcuuiuuicu LU 1116 further object to provide sheet-anchoring apparatus which θ₅ reverse bend, as indicated in broken lines in FIGURE 2 run Via incfallorl /-ιιιίοΐι-ΐτκ «««ιί!·,, · , . ____ ¹ can be installed quickly and easily.

An additional important object is to provide such apparatus which covers and protects the roof edge to prevent weathering and especially to prevent wind from entering between and exerting a force to separate the roofing ₇₀sheets from the sheathing.

FIGURE 1 is a top perspective of sheet-anchoring apin response to temperature changes. The sheet can also contract or expand without restraint longitudinally of the sheet-anchoring apparatus by sliding of the reverse bend lengthwise of the anchoring elements.

The holder 3 and bracket Ί shown in FIGURE 5 are similar to the holder and bracket shown in FIGURES 3 and 4. The holder extends in contiguous engagement

902 tween roof sheets due to temperature variations. Rainwater or other moisture which collects on roof sheet S cannot penetrate between the roof sheathing R and sheet S because of the reverse bend in the sheet margin when the anchoring apparatus of FIGURE 2 or FIGURE 4 is used. If, during a heavy rain, water should be forced upward, over and around the bend, it will flow between sections 1 and 2 and run out, with section 2 protectively encasing the roof edge. Similarly, if water is driven into the lower fold of the roofing sheet reverse bend shown in FIGURE 5, such water would simply run out between sections 24 and 29, so that water cannot be forced under the roofing sheet.

In FIGURE 3, the upper edge of the lower section 2’ is provided with a flange 23 inclined downwardly to its edge for supporting the margin of sheet S. Such strip may extend downward to and rest on a layer of cork C or other insulating material underlying the roofing sheet as shown in FIGURE 4 and simultaneously tends to prevent the lower end of section 2' from tilting out of engagement with holder 3'.