Understanding NAFS 11 - AAMA 450, by Elie Alkhoury, M.Eng, P.Eng. 2/8/2017

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UnderstandingNAFS 11 – AAMA 450

ByElie Alkhoury, M.Eng. (Building Science), P.Eng

CAN-BEST Building Sciences Corporation

A FENCON 17 PresentationFebruary 10, 2017

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Established in 1985

ISO 17025 SCC Accredited Laboratory

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1. NAFS11 – Unit Rating

2. NAFS11 – Combination Rating

3. AAMA 450 – Mullion Rating

4. Option #1 – Assembly Testing

5. Option #2 – Mullion Testing

6. Option #3 – Calculations by P.E.

7. Grouping

8. AAMA 2502 –Comparative Analysis

9. CAN-BEST MRA

This Presentation

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Understanding NAFS 11 - AAMA 450, by Elie Alkhoury, M.Eng, P.Eng. 2/8/2017

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NAFS11 Rating - Individual Units (earlier presentation)

Secondary Designator Canadian Requirement)

Primary Designator

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Composite Unit

A fenestration product consisting of two or more sash, leaves, lites, or sliding door panels within a single frame utilizing an integral mullion.

Understanding NAFS 11 - AAMA 450, by Elie Alkhoury, M.Eng, P.Eng. 2/8/2017

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Combination Assembly

An assembly formed by a combination of two or more separate fenestrationproducts whose frames are mulled together utilizing a combination mullion or reinforcing mullion.

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Window WallA non-load-bearing fenestration system provided in combination assemblies and composite units, including transparent vision panels and/or opaque glass or metal panels, which spanfrom the top of a floor slab to the underside of the next higher floor slab.

Understanding NAFS 11 - AAMA 450, by Elie Alkhoury, M.Eng, P.Eng. 2/8/2017

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1. NAFS11 – Unit Rating

2. NAFS11 – Combination Rating

3. AAMA 450 – Mullion Rating

4. Option #1 – Assembly Testing

5. Option #2 – Mullion Testing

6. Option #3 – Calculations by P.E.

7. Grouping

8. AAMA 2502 –Comparative Analysis

9. CAN-BEST MRA

This Presentation

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Mullion Labeling Introducing Product Type MA – Mullion Assembly

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Great Document

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Labeling Example – Fenestration Canada

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Rating a Combination Assembly Two options to rate combination assemblies

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Option (a) – One TestTest one Combination Window

1. Test one combination assembly with individual units meeting Gateway dimensions.

2. Rate individual units and mullion assembly separately. The lowest rating governs the Overall Rating.

3. Optional - Determine rating of smaller units having shorter mullion span and smaller tributary areas - AAMA 2502.

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Option (b)Test individual units

1. Test and rate individual units meeting Gateway dimensions.

2. Test and rate Mullion as per AAMA 450. The lowest rating governs the Overall Rating.

3. Optional - Determine rating of smaller units having shorter mullion span and smaller tributary areas - AAMA 2502.

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1. NAFS11 – Unit Rating

2. NAFS11 – Combination Rating

3. AAMA 450 – Mullion Rating

4. Option #1 – Assembly Testing

5. Option #2 – Mullion Testing

6. Option #3 – Calculations by P.E.

7. Grouping

8. AAMA 2502 –Comparative Analysis

9. CAN-BEST MRA

This Presentation

Understanding NAFS 11 - AAMA 450, by Elie Alkhoury, M.Eng, P.Eng. 2/8/2017

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AAMA 450Mullion Rating

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AAMA 450Mullion Rating

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1. NAFS11 – Unit Rating

2. NAFS11 – Combination Rating

3. AAMA 450 – Mullion Rating

4. Option #1 – Assembly Testing

5. Option #2 – Mullion Testing

6. Option #3 – Calculations by P.E.

7. Grouping

8. AAMA 2502 –Comparative Analysis

9. CAN-BEST MRA

This Presentation

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Option #1Assembly Testing

Obtained rating qualifies all smaller assembly sizes having shorter mullion span and smaller tributary areas.

Rating applies to same mullion section, seal and end connections.

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© CAN-BEST 2017

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1. NAFS11 – Unit Rating

2. NAFS11 – Combination Rating

3. AAMA 450 – Mullion Rating

4. Option #1 – Assembly Testing

5. Option #2 – Mullion Testing

6. Option #3 – Calculations by P.E.

7. Grouping

8. AAMA 2502 –Comparative Analysis

9. CAN-BEST MRA

This Presentation

Understanding NAFS 11 - AAMA 450, by Elie Alkhoury, M.Eng, P.Eng. 2/8/2017

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© CAN-BEST 2017

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Understanding NAFS 11 - AAMA 450, by Elie Alkhoury, M.Eng, P.Eng. 2/8/2017

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Mullion Cross

Section

Mullion Test Validation

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1. NAFS11 – Unit Rating

2. NAFS11 – Combination Rating

3. AAMA 450 – Mullion Rating

4. Option #1 – Assembly Testing

5. Option #2 – Mullion Testing

6. Option #3 – Calculations by P.E.

7. Grouping

8. AAMA 2502 –Comparative Analysis

9. CAN-BEST MRA

This Presentation

Understanding NAFS 11 - AAMA 450, by Elie Alkhoury, M.Eng, P.Eng. 2/8/2017

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Mullion Cross

Section

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1. NAFS11 – Unit Rating

2. NAFS11 – Combination Rating

3. AAMA 450 – Mullion Rating

4. Option #1 – Assembly Testing

5. Option #2 – Mullion Testing

6. Option #3 – Calculations by P.E.

7. Grouping

8. AAMA 2502 –Comparative Analysis

9. CAN-BEST MRA

This Presentation

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Grouping

Understanding NAFS 11 - AAMA 450, by Elie Alkhoury, M.Eng, P.Eng. 2/8/2017

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© CAN-BEST 2017

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1. NAFS11 – Unit Rating

2. NAFS11 – Combination Rating

3. AAMA 450 – Mullion Rating

4. Option #1 – Assembly Testing

5. Option #2 – Mullion Testing

6. Option #3 – Calculations by P.E.

7. Grouping

8. AAMA 2502 –Comparative Analysis

9. CAN-BEST MRA

This Presentation

Understanding NAFS 11 - AAMA 450, by Elie Alkhoury, M.Eng, P.Eng. 2/8/2017

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AAMA 2502OptionalComparative Analysis

Allows rating determination for assemblies smaller than the tested assembly.

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AAMA 2502

NAFS11

9.2.4 Specimen Size

.

.

Except as described in AAMA 2502 and/or WDMA I.S.11, Section 3.4, test results shall be valid only for

products up to and including the width and height of the specimen tested.

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Calculated Window Rating AAMA 2502

Mullion Cross

Section

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Window Rating – AAMA 2502

Tributary Width

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1. NAFS11 – Unit Rating

2. NAFS11 – Combination Rating

3. AAMA 450 – Mullion Rating

4. Option #1 – Assembly Testing

5. Option #2 – Mullion Testing

6. Option #3 – Calculations by P.E.

7. Grouping

8. AAMA 2502 –Comparative Analysis

9. CAN-BEST MRA

This Presentation

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Making the Leap

Rate your Mullionswith

CAN-BEST MRA Program(Mullion Rating Assessment)

a cost effective mullion rating program based on AAMA 450 – Option #2

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CAN-BEST MRA – Grouped Products1. Review individual window products and associated

mullions having identical sealing details. Determine weakest window and mullion assembly.

2. If not done previously, test individual units to meet NAFS 11 Gateway Requirements.

3. Test one window assembly for Air, Water and structural.4. Test one mullion assembly as simply supported beam

single-point loading to determine it’s stiffness (EI), and validate with window test EI. Use EI to derive Mullion Assembly DP rating for various mullion spans and tributary width. Verify mullion connections adequacy.

5. Assign SAME rating to all mullion group members.

6. Prepare P.E. sealed AAMA 450 report.

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CAN-BEST MRA – Individual Products1. Review individual window products and associated

mullions having identical sealing details. Determine weakest window and mullion assembly.

2. If not done previously, test individual units to meet NAFS 11 Gateway Requirements.

3. Test one window assembly for Air, Water and structural.4. Test EACH mullion assembly as simply supported beam

single-point loading to determine it’s stiffness (EI), and validate with window test EI. Use EI to derive Mullion Assembly DP rating for various mullion spans and tributary width. Verify mullion connections adequacy.

5. Assign ACTUAL rating.

6. Prepare P.E. sealed AAMA 450 report for each mullion configuration.