How to fit this lintel?

[Unforgiven]

I have a lintel to go above my door to the garden, it is in a corridor 90cm wide.

There is no lintel at the moment that I can see.

I need to raise the door by one level of bricks. 

 

1, Do I even need a lintel? There would only be 3 courses of brick above as it's a Bungalow.

2, If I do need a lintel how do I support it both ends?

 

Edited March 22 by Unforgiven

[Iceverge]

Outside picture too please. 

[Canski]

Seeing as there is no visible support in your photo and If it is a half brick thick wall I think an L shaped lintel would suffice.  Prop the joists chop out and insert the new lintel. 

[MortarThePoint]

This looks a bit strange as it is since I would have expected a lintel to have been there already. laying the bricks without a lintel would have needed a temporary wooden form (or the like) which feels like more effort than a lintel.

 

The L-shape lintel sounds good to me. The hard bit will be getting into the sides since it needs to overextend the opening by 150mm ideally, though 100mm may be fine for such a short span.

[Unforgiven]

Outside view

 

I have an L shaped lintel ready to go.

Is it ok to cut off the "upright" part of the L, 150mm from both ends so I just have the flat horizontal part of the L and slide it into the gap left when I drill out the mortar? Or is that a huge no-no?

Edited March 25 by Unforgiven

[MortarThePoint]

That sounds pretty dodgy. You'd need it L-shaped all the way along as otherwise the 'tabs' could just fold up. 

 

I'm surprised by these levitating bricks that are otherwise just supported by the door. 

[Unforgiven]

Ok, thanks for the info, will get some acrows and strongboys and get on it at the weekend.