Technical

Frame Types

Main Span
This is where the building is the same height at the rear as at the front. We will normally go up to a maximum main span of 8m and any main span over 6m will need a truss roof construction.

Main_Span

 

Main Span with Rear Aisle
This is where there is an aisle on the rear allowing you to get a greater depth of building but also keeping the ridge height down. The roof pitch on the aisle is usually slightly shallower than the main roof and it can be as deep as is practical. We will normally go up to a maximum main span of 8m and any main span over 6m will need a truss roof construction.

Main_Span_Rear_Aisle

 

Aisled Barn
The central main frame usually has a high eaves height and then there are aisles either side to increase the internal floor space We will normally go up to a maximum main span of 8m and any main span over 6m will need a truss roof construction.

Aisled_Barn-1

 

 

Main Span with First Floor with Central Post
First floor options can be fitted into most buildings but the larger the main span and greater the roof pitch, the greater the useful area upstairs. There is a central post under the tie beam to help take the load of the floor. We will normally go up to a maximum main span of 8m.

Main_Span_First_Floor_Central_Post

 

Main Span with First Floor without Central Post
This frame type gives you a first floor area without the need for a central post under the tie beam but the heights are reduced upstairs as the tie beam has to be a lot bigger to take the floor load. Also with this frame type you need to increase the post sizes as more forces are being transferred to the posts than if you had a central post. The maximum main span for this frame type is about 6.4m although larger spans have been done using steel RSJ’s bolted to either side of the oak tie beam.

 

Main_Span_First_Floor_No_Central_Post

Raised Plate with Central Post
This design gives you a little extra room in the roof compared with the Main Span with First Floor. There is a central post under the tie beam to help take the load of the floor. We will normally go up to a maximum main span of 8m.

Raised_Plate_Central_Post

 

Raised Plate without Central Post
This design gives you a little extra room in the roof compared with the Main Span with First Floor. The maximum main span for this frame type is about 6.4m although larger spans have been done using steel RSJ’s bolted to either side of the oak tie beam.

Raised_Plate_No_Central_Post

 

Sling Brace
This design gives a 1½ storey building but you have the sling braces to incorporate into you space upstairs. The maximum main span on this design is about 6.6m. This frame type does not lend itself very well to go around corners in either an ‘L’ or ‘T’ shaped configuration as there are eaves beams at waist height.

Sling_Brace

 

Two Storey
This is a normal two storey construction.

Two_Storey

 

Lean-To
This is where there is a wall plate attached to an existing structure to pitch the roof on.

Lean-To

 

Monopitch
This is like the lean-to design except it is totally free standing and self-supporting.

Monopitch

 

Flat Roof

This is a standard flat roof design and is used if you have low height restrictions. It is often used with glazed lanterns on top to give light inside.

Flat_Roof

 

Pitched Roof with Flat Roof

This is where a pitched roof is cut off with a flat top and is used if you have low height restrictions or you still want a view from an existing upstairs window. It is often used with glazed lanterns on top to give light inside.(as shown)

Pitched_Roof_with_Flat_Top

 

 

TRADA Q Mark