Decking Clips for Threaded Rod. Girder Hole Size 7mm. Threaded Rod Size M10. Length below Girder 74mm. Load Rating 45kg for Girder Thickness 0.8-2mm. Load Rating 68kg for Girder Thickness 2-3mm. Zinc silver colored sacrificial coating (Z600+), waterproof topcoat, for use in indoor and outdoor humid and mildly corrosive environments. Coating is completely chromium free.