G5 - Describe door frames used in concrete and masonry walls Flashcards
What is the most common type of doorjamb used in concrete walls?
Metal
Wooden door jambs are usually cast in place with?
Reverse key attached
What is added if door jambs are not snug to both sides of the forms?
Filler on one side
How is a metal doorframe secured in an existing masonry opening?
Hollow or solid wall fasteners
What keeps a doorframe from moving before bricks or block are placed around it?
Bracing
What must be done to keep concrete from leaking through the metal frame?
Plug or pre-drilled holes or openings.
Wooden door jambs in concrete are mostly set when?
After the concrete is in place.
If there is no buck in the concrete what is done?
Plumb, shim and level, then fastened using solid wall fasteners
When wooden door jamb is to be set in a concrete block, the bricklayer builds:
The wall tight to the frame, and attaches metal anchors to it that fit between brick or block courses.
Frame bracing in concrete wall must be:
Every 300 MM
To install the jamb in a masonry wall, you must:
Carefully brace, support and level jamb in such a way that it does not interfere with mason’s work.
When steel frames are used in a block wall, what kind of header does it have?
an Extra deep header to make up the difference in height between regular door height and a whole number of block courses.
To anchor the frame into masonry walls, brick layers install:
Wire or sheet metal anchors between the courses of blocks & bricks. These are held in place by mortar and come in a wide variety of shapes and sizes.
How to install metal door jambs in concrete?
Screw them with pre-drilled holes, use hollow or solid wall fasteners depending on the type of wall. 3 points on each side.