Grammar
-(이)라면
If it is / assuming it is
Form
Last Name + -(이)라면 — « if it is ... »
Function
-(이)라면 uses a name or a situation as a hypothesis.
Why this form?
보통은 describes a general habit. It can be translated as "Usually".
(ex : 보통은 열려 있어요. — It's usually open.)
보통이라면 invites us to imagine what would happen under normal circumstances. It can be translated as "under normal circumstances / if things were normal"".
Examples
보통이라면 간호사나 의사, 심지어 방문객들도 돌아다니고 있어야 한다. — Normally, nurses, doctors, and even visitors should be able to move around.
나라면 그렇게 하지 않겠어요. — If I were you, I wouldn't do that.