Insulation suspension system

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT Referring to the drawings, the numeral 10 generally designates the existing roof panel of a building.
The roof panel is supported by a plurality of purlins 12 which extend parallel to one another in spaced apart relation.
This use of purlins is conventional in many types of building construction, particularly in the construction of metal buildings.
In cross-section, each purlin includes an upper horizontal flange 14 and a lower horizontal flange 16, which are joined together by a vertical upstanding web 18.
The outer edges of horizontal flanges 14, 16 are each provided with a canted edge 20.
Interposed between purlins 12 and roof panel 10 is a layer of exisitng fiberglass batt insulation 22 which is conventionally applied to most buildings.
In buildings that have been constructed in prior years, this insulation is insufficient in thickness to provide adequate insulation in view of increasing fuel costs.
Accordingly, in many presently existing buildings, it is desirable to supplement insulation 22 with an additional thicker layer of batt insulation.
The present invention provides this additional insulation by utilizing a plurality of elongated support members 24.
Support members 24 may be of any desired cross-sectional configuration, but the preferred configuration utilizes an angle construction having in cross-section a pair of angle legs 26, 28 which are at an approximate right angle with respect to one another.
Support members 24 are suspended from purlins 12 by means of a plurality of clips 30.
Each clip 30 includes a clamp portion 32 comprising an upper plate 34 and a lower plate 36, which are folded back over upon one another in spaced apart relation so that they will conform to and embrace the upper and lower surfaces of the horizontal flanges 20 of purlins 12, as can be seen in FIG.
3.
Because these plates 34, 36 conform to the horizontal flange 16 and the canted edge 20 thereof, they hold the clip 30 against any movement with respect to the purlin when they are clamped on the purlin as shown in FIG