Lintel in Gable Cavity Wall for new First Floor Doorway


Postby jr2981 » Fri Mar 10, 2017 3:46 pm

Hi,

i am looking to add a new 1st floor doorway through the old gable end wall of my house into an extension, this will involve setting of a 1.2 long cavity wall lintel to give a 900mm opening. I've been reading the BS5977 standard for lintel loads to determine what loads i need to consider and as this is on the 1st floor i think i only need to consider the roof, masonry and self weight of lintel, the latter two are easy but calculating the roof loads is very confusing, has anyone completed calculations for a similar scenario??
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Postby arbco » Sat Apr 01, 2017 8:21 pm

In a gable it's unlikely that the floor or roof (except a purlin) will impose any loads. Suggest two box lintels or concrete lintels will be ok as it's only a small opening.
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