Mullion Strength Ratings (Pa)


This page contains a range of ratings based on the interlocking mullions. The following page shows a similar table based on snap together mullions. The lower left illustration shows how we can fit stiffeners inside the interlocking mullions if required.
When the overall width of the framing system exceeds 6000mm we recommend interlocking mullions to accommodate expansion and contraction.

Mullion Height	Mullion centres	102mm Plain	102mm Stiffened	150mm Plain	150mm Stiffened
2200	800	1890	2379	3333	3333
2200	1000	1560	1962	3333	3333
2200	1200	1350	1699	3333	3333
2400	800	1443	1816	3333	3333
2400	1000	1185	1491	3333	3333
2400	1200	1019	1283	3091	3333
2600	800	1128	1419	3333	3333
2600	1000	922	1160	3047	3333
2600	1200	789	993	2599	3333
2800	800	898	1130	3025	3333
2800	1000	732	921	2466	3333
2800	1200	624	786	2103	2948
3000	800	727	915	2449	3333
3000	1000	591	744	1991	2791
3000	1200	503	633	1693	2373

Serviceability strength ratings have been limited to 3333 Pa.
Based on 1/250 metal deflection. More span charts are shown in the AWS Specifier Manual.

For CAD files go to installation details.