SECTION 08 51 13 ALUMINUM WINDOWS

Trim-All™ Panning System

Add to 2.02 Fabrication of window specification.

(X.)	Exterior Panning System
1.	The panning system shall be extruded. Roll formed or formed aluminum materials shall not be acceptable.

Insert the following if project is historical, or if retaining the architectural details of the project is desired.
2.	It is intended that the panning provided match the architectural details, as closely as possible, in sightline and profile. New dies may be required, and if required, the cost of same will be incorporated in the material bid.
3.	The panning/receptor system shall be an extruded aluminum shape with a minimum thickness of .062". Panning/receptor shape shall match bid document details. Any proposed variation must be approved by the architect prior to the bid and shall be presented in the form of a die drawing from the window manufacturer. Corners of the panning shall be factory mitered. Panning assembly shall not require the use of exposed fasteners.

Describe panning frame extrusion profile or specify an existing extrusion by number and insert here.
a.	Panning frame profile shall be ___.
b.	Sightline encroachment shall be minimized by panning frame design.

Select method of panning frame fabrication. Two methods of fabrication (i.e., screw spline construction versus welded corners) are possible. A welded unit will have tighter, better fitting corners, and will be stronger structurally, but obviously more expensive. All pan extrusions can be welded, but not all shipped “knocked down” (KD) and screwed together in the field.
4.	Panning shall be shipped KD and field assembled.
a.	A stainless steel corner alignment clip shall be provided for each joint. Clip shall be of such design that after panning frame is installed, weather sealing or caulking will completely cover clip.
b.	Back seal all panning frame joints to prevent water migration into frame cavity prior to installation.
		OR
4.	Panning shall be shipped factory fabricated and welded.
5.	All panning extrusions shall have a minimum wall thickness of .062" (1.5 mm).
6.	Each panning unit shall be assembled and installed in the building separate from the replacement window. Wraparound panning units that are field attached directly to the window, longer exterior legs on the window frame to simulate a panning system, or extruded extenders added to the window legs to simulate panning shall not be acceptable.
7.	The sill of the panning system shall have an upturned leg set behind the exterior leg of the window sill.  Jamb and head panning extrusions shall overlap the exterior of the window to act as a rain screen. All four sides of the panning unit shall have weather-stripping pulled through dovetails in the extrusions. Weather stripping shall be back sealed with a continuous bed of sealant prior to window installation.
8.	The panning unit shall be installed in the prepared opening from the inside of the building and anchored directly to the opening through factory punched/drilled mounting holes. The window shall be held tightly against the panning weather stripping by stainless steel spring clips mounted at the jambs and head at 16" (406 mm) O.C. The spring clips shall not provide the primary window anchorage. Interior trim clips, through the window frame fasteners, or "F" anchors shall be used for wind load resistance.
9.	The vertical leg of all four sides of the panning unit shall typically require field ripping for an exact fit in the window opening.
(Y)	Interior Trim System
1.	The interior trim system shall consist of a mill finish aluminum clip (minimum wall thickness .094" (2.3 mm) to anchor the window to the window opening and a finished aluminum cover (minimum wall thickness .050" (1 mm). The cover shall snap fit onto the clip, concealing all anchorage fasteners.

Insert the following if project is historical, or if retaining the architectural details of the project is desired.

2.	Interior trim shall replicate design of existing trim.

Describe trim extrusion profile, or specify an existing extrusion by number and insert here.

a.	Trim profile shall be ___.
3.	The clips shall be provided in 3" (76 mm) lengths and spaced at 16" (406 mm) O.C. All fasteners anchoring the clip to the windows shall be by the window manufacturer. The clip shall be designed to provide the primary structural support for the window system.
4.	The cover shall be provided by the window manufacturer in lineal lengths longer than the critical opening dimension and field trimmed for an exact fit.
5.	The formed aluminum and extruded trim shall not be combined on the same window opening since the radiused corners of the formed aluminum and the square corners of the extrusion are not aesthetically compatible.

Trim-All is a trademark of EFCO Corporation.

5/5/2006