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Frequently Asked Questions
What makes a top-flange hanger different?
The flange hooks over the beam, so load goes into the timber by direct bearing.
It does not rely on fasteners working in shear to carry the main load.
The strongest part of the connection becomes the beam itself.
That is the entire point of the design.
Fewer fasteners are needed as a result.
Capacity is frequently higher than a face-mount hanger of the same size.
What does it require in return?
Clearance above the beam, because the flange occupies the top surface.
Anything bearing directly on the beam has to accommodate it.
Sheathing or decking sitting flat may need the flange recessed.
Where that is impractical, the hanger cannot be used.
Deciding this at design stage is far easier than at deck stage.
It is the constraint that most often rules the type out.
Does beam width matter?
Yes - the flange has to sit properly rather than perch on an edge.
Bearing length along the beam top is part of the specification.
Narrow beams may not offer enough surface.
Engineered beams carry specific requirements and sometimes reduced values.
Steel beams need the flange detail suited to the section.
The manufacturer publishes what each beam type requires.
Do the fasteners still matter?
Yes, even though fewer of them carry less of the load.
They hold the hanger in position during and after installation.
They resist uplift and lateral movement.
The schedule remains part of the rating rather than a fixing convenience.
Missing fasteners still invalidate the published figure.
The reduction in quantity is a saving in labour, not permission to skip them.
Is installation actually faster?
Noticeably, particularly on repetitive work.
Fewer fasteners means less time per connection.
The hanger self-locates by hooking over the beam.
A floor of identical joists into one beam is where it shows most.
Positioning is quicker because the flange sets the height.
On a small number of connections the saving is not worth designing around.
Can it be used with a steel beam?
Versions exist for steel, and they are not the same part as the timber ones.
Flange thickness and profile have to suit the section.
Fixing into steel uses different fasteners entirely.
Some designs clamp rather than fix.
Fire protection to the steel can conflict with the connection.
The manufacturer's steel-specific range is what applies rather than the timber tables.
How does capacity compare with face-mount?
Generally higher for the same size, because bearing beats shear.
Direct bearing into timber is a stronger load path than fasteners.
The margin depends on the beam material and the hanger size.
Published tables give the actual figures side by side.
Capacities differ between markets and their approval schemes.
The local tables and code govern together rather than a general expectation.