When replacing lintels from this period, it will normally suffice to execute a careful removal of the brickwork above the lintel and then replace the wooden lintels with steel-reinforced brick, which can easily support the few courses between the edge of the window niche and the beam above.

Recommended literature in Danish:
Herholdt: Vejledning i Husbygningskunst (1877)
G.v. Huth: Vejledning i konstruktion af trætrapper (1887)
Byggebogen: Ydervægge, alment (1953)

© GI - Bedre Boliger og Realdania