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A curtain wall mullion or transom including a component made of a thermally insulating material bonded to a metal structural segment such that a stem of the component extends into a pocket defined by panels of a curtain wall system. The component may be a reinforced fiberglass polymer component and

A curtain wall mullion or transom including a component made of a thermally insulating material bonded to a metal structural segment such that a stem of the component extends into a pocket defined by panels of a curtain wall system. The component may be a reinforced fiberglass polymer component and bonded to the metal segment with an adhesive and may isolate the metal structure from the atmosphere outside the curtain wall and may include a seal receiver which abuts a panel of the curtain wall. The metal segment may be made of steel or aluminum or other metal. A pultrusion method is used to make the fiberglass component to have a profile configured to cover an entirety of an outside of the mullion or transom and to have a pair of receivers for receiving seals to abut against panels of the curtain wall.

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1. A curtain wall mullion or transom for use on a curtain wall system, said mullion or transom comprising: a metal mullion or transom structure having an outer side; anda thermally insulating fiberglass reinforced polymer component rigidly bonded to said metal structure at an outer face of said oute

1. A curtain wall mullion or transom for use on a curtain wall system, said mullion or transom comprising: a metal mullion or transom structure having an outer side; anda thermally insulating fiberglass reinforced polymer component rigidly bonded to said metal structure at an outer face of said outer side, said component bonded to said metal structure by adhesion with an adhesive, said component including a stem configured to project into a space between a first panel and a second panel of a curtain wall, said component covering substantially an entirety of said outer side. 2. The mullion or transom of claim 1 where said thermally insulating component covers an entirety of said outer side. 3. The mullion or transom of claim 1 where said fiberglass reinforced polymer component spans a maximum longitudinal length of said mullion or transom. 4. The mullion or transom of claim 1 where said fiberglass reinforced polymer component defines at least one seal receiver configured to receive a seal oriented to abut the first panel. 5. The mullion or transom of claim 4 where said fiberglass reinforced polymer component defines another seal receiver configured to receive a seal oriented to abut the second panel. 6. The mullion or transom of claim 1 where said metal structure includes opposing walls, said thermally insulating component includes fingers bonded to said opposing walls. 7. The mullion or transom of claim 1 further comprising a pressure plate configured to apply pressure to a seal associated with the first panel and to a seal associated with the second panel, said stem configured to receive a fastener inserted through said pressure plate. 8. The mullion or transom of claim 1 where said metal structure includes a steel segment and where said component is configured to support a weight of a panel of the curtain wall system. 9. A curtain wall system comprising: a cell including a first mullion, a second mullion, a first transom and a second transom, said first transom including a metal transom structure having an outer side having an outer face, said transom including a fiberglass reinforced polymer rigidly bonded to said outer face of said outer side by adhesion with an adhesive, said fiberglass component covering an entirety of said outer side; anda panel secured to said cell. 10. The system of claim 9 where said fiberglass component has a length equal to a maximum length of said transom and comprises a stem configured to support a weight of said panel. 11. A curtain wall mullion or transom for use on a curtain wall system, said mullion or transom comprising: a metal mullion or transom structure having an outer side, said outer side defining an outer face; anda thermally insulating component comprising a fiberglass reinforced polymer rigidly bonded to said metal structure at said outer face of said outer side, said component bonded to said metal structure by adhesion with an adhesive, said component including a stem configured to project into a space between a first panel and a second panel of a curtain wall and past a panel frame of the first panel. 12. The mullion or transom of claim 11 where said component comprises a pultruded fiberglass reinforced polymer and includes an arm extending from a stem of said component, said arm defining at least one seal receiver. 13. The curtain wall mullion or transom of claim 12 where said fiberglass reinforced polymer supports a total weight of the panel. 14. The curtain wall mullion or transom of claim 12 where said fiberglass reinforced polymer together with said adhesive are the sole structural materials rigidly connected to said mullion or transom and extending between the first panel and the second panel. 15. The curtain wall mullion or transom of claim 12 further comprising a setting block positioned between the fiberglass component and the first panel. 16. The mullion or transom of claim 12 where said component is bonded to said metal structure with an adhesive positioned between said component and an outermost surface of said outer side. 17. The mullion or transom of claim 12 where said component comprises a pultruded fiberglass reinforced polymer.