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Installing roof hooks and horizontal rails 55.3 Adjustable Roof Hooks on FlatShingle and Slate RoofsNOTICEIt is recommended to consult a rooferwhen installing on shingle or slate roofs.Ensure the required distances (w, x and y) between theroof hooks as detailed in (Tab. 4 and Tab. 5, page 14).Remove the needed number of shingles/tiles to gainaccess to the sheathing where to mount the roof hook(Fig. 14, [1]).The roof hooks must be directly bolted to the buildingsubstructure with sufficient capacity to carry the load ofthe solar system including required snow and windloads.Fig. 14Remove the needed number of shingles/tilesPreparing roof hookBefore installing, the lower part must be moved to thecorrect position. Loosen the long hex-nut (Fig. 15, [2]) anddisassemble the unit. Insert bolt into upper hole (Fig. 15, [3]). Reassemble with the L-shaped piece (Fig. 15,center) facing away and down. Do not tighten the nut (Fig. 15, [2]) until the hook isinstalled and properly adjusted.SYSTEM DAMAGE3124CAUTION!from failure of the roof hook if the bolt isnot positioned in the upper hole, resultingin uneven load distribution.Fig. 15 Repositioning lower part of roof hook1 L-shaped attachment piece2 Long hex-nut3 Upper hole4 Cut off if necessary63043965.16-1.SDLogasol SKN 3.0 - We reserve the right to make any changes due to technical modifications. 17