b'Guide to Determine Number of Clips1.No. of clips per side = P x W x H 2. Most windows are rectangles. For example an individual double hung unit with the frame size of36 W x 60 H. Assume the example project siterequires 40 psf wind pressure. No. of clips = (P x W x H)(.0001)/4figures to be(40psf x 36 x 60)(.0001)/4 = 2.16 clips 3. Round up to the next higher number, thus budget3 clips equally spaced along each long side. 4. Calculate the spacing between clips along eachlong side. Select a distance from corner of no lessthan 8 and not greater than 24. 5. Attach clips to short sides (head and sill) at aboutthe same spacing. In this example use 2 clips on thehead and 2 clips on the sill. If in doubt reduce thenumber of clips so that they are not closer than 8from corner. Thus, 3+3+1+1 = 8 clips total. 6. For Curved or angled units, substitute a rectangleof the same overall width and height. Attach clips atthe calculated on center spacing to the curved andstraight sides. 7. Double hung units are often tested and rated without clips along the sill because the sill is sloped.If the sill is determined to need a clip and it is sloped,a wood wedge may be glued to the underside toattach the clip to the window. 1. Insert Closed Cell Foam Backer Rod into space8. For assemblies of several individual units mulled around the window leaving 1/4 spacebetweentogether, calculate clips and spacing for each individ- backer rod and exterior face of the windowual unit and attach clips to the available outside 2. Apply bead of ASTM-C-920 compliant sealantperimeter sides. At the end of mulls, additional fas- around the entire perimetertening might be required. Confirm with project engi-neer or architect/engineer or manufacturer. 3. Tool and shape and clean excess sealant.Fastening ClipsClips may be attached to Hammer the window unit either Bendbeing rotated into placewithin a groove designed toaccept the clip (uPVC) orscrewed into the frame(wood). The clip, dependingon the length may be faceanchored to the roughopening one #8 x 1-1/14Sheet Metal Screws screwinto face of wood buck.Face If the clip is longer so it Mountprojects out beyond thewood buck or rough open-1. Insert Slow Expansion foam tape between ing, then it can be bent tobe flush with the interior the window and the old opening with sufficientsurface of the buck or room to allow expansion and conformity to therough opening. Use two #8irregularities of the opening.x 1-3/4 Flat Head SheetMetal Screws. 2.Sealant may not be required. Window Fitters Guide to Window Installation842020 AWDI, LLC Do not reproduce without permission'