G5 - Describe door frames used in concrete and masonry walls Flashcards

1
Q

What is the most common type of doorjamb used in concrete walls?

A

Metal

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1
Q

Wooden door jambs are usually cast in place with?

A

Reverse key attached

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1
Q

What is added if door jambs are not snug to both sides of the forms?

A

Filler on one side

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2
Q

How is a metal doorframe secured in an existing masonry opening?

A

Hollow or solid wall fasteners

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3
Q

What keeps a doorframe from moving before bricks or block are placed around it?

A

Bracing

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4
Q

What must be done to keep concrete from leaking through the metal frame?

A

Plug or pre-drilled holes or openings.

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5
Q

Wooden door jambs in concrete are mostly set when?

A

After the concrete is in place.

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6
Q

If there is no buck in the concrete what is done?

A

Plumb, shim and level, then fastened using solid wall fasteners

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7
Q

When wooden door jamb is to be set in a concrete block, the bricklayer builds:

A

The wall tight to the frame, and attaches metal anchors to it that fit between brick or block courses.

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8
Q

Frame bracing in concrete wall must be:

A

Every 300 MM

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9
Q

To install the jamb in a masonry wall, you must:

A

Carefully brace, support and level jamb in such a way that it does not interfere with mason’s work.

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10
Q

When steel frames are used in a block wall, what kind of header does it have?

A

an Extra deep header to make up the difference in height between regular door height and a whole number of block courses.

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11
Q

To anchor the frame into masonry walls, brick layers install:

A

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.

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12
Q

How to install metal door jambs in concrete?

A

Screw them with pre-drilled holes, use hollow or solid wall fasteners depending on the type of wall. 3 points on each side.

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13
Q
A
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