| • |
Thor helical reinforcement wire should be laid straight and un-coiled at least 24 hours before
installation. |
| • |
Mortar strength should comply with AS3700 – 2001 Type M3, (C X 1, L X 1, S X 6), and the use of
additives affecting bond strength avoided. |
| • |
Temporary “opening” formwork should incorporate a separating membrane to minimise adhesion to
fresh mortar and secured in a manner to provide for ease of removal. |
| • |
The height of temporary “opening” formwork should provide for the mortar bed-joint supporting
adjacent bricks. |
| • |
Masonry adjacent to the opening should be laid a minimum of 24 hours to gain strength, prior to
lintel construction. |
| • |
The first course of brickwork should be laid “frog” up as it will have the underside fully
exposed. |
| • |
All brick “perp” end joints above the opening shall be completely filled with mortar to provide
maximum compression resistance. |
| • |
Thor helical reinforcement wires should be evenly spaced across the mortar bed-joint and must have
a minimum bond length extension of 500mm at each end of the opening. |
| • |
Thor helical reinforcement wires must be fully embedded in the mortar, which may
need to be applied in two applications. |
| • |
The masonry lintel must be kept damp for a minimum of three days to aid curing and must not be
disturbed in such a manner as to cause horizontal delamination. |
| • |
Climatic conditions may require wetting of the bricks prior to mortaring to minimise moisture
loss during the construction and curing processes. |
| • |
Consideration must be given to the location of flashings, membranes and weep holes. |
