Tech Talk: Arches

KWIK LINTEL is a temporary support and removable metal beam used when laying concrete masonry blocks over any opening.

Now that the busy season is upon us, contractors nationwide are rolling out their fleets and dusting off their tools and equipment for what hopefully will be another profitable summer.

In 2007, Stephen Bushway, owner of Deer Hill Masonry in Cummington, Mass., was contacted by Geary Builders of Cheshire, Mass., to design two stone fireplaces for a timber frame addition...

Example 2
ceeds, preventing mortar droppings from clogging the cell (see Example 2).

III. Door and Window Lintels
Lintels for door and window openings can be temporarily supported with framing lumber and laid in place (see Detail C). A

NCMA TEK
National Concrete Masonry Association
a information series from the national authority on concrete masonry technology
TYPICAL SIZES AND SHAPES OF
CONCRETE MASONRY UNITS
**Keywords:** architectural units, bond beams, concret

sizes, other unit heights, lengths, and thicknesses may be available from local concrete masonry producers.

Standard Specification for Load-Bearing Concrete Masonry Units, ASTM C 90 (ref. 4) is the most frequently referenced standard for concre

Beams

cracked section properties such as k and j must be determined based on the amount of reinforcement, the moduli ratio and the loading conditions. Pilasters which are loaded both out-of-plane and in-plane must be designed considering the in

9.8.2.3
Walls shall be anchored by joint reinforcement spaced at a maximum distance of 8 in. (200 mm). Longitudinal rods of such reinforcement shall be at least 9 gage (W 1.7) and shall extend at least 30 in. (762 mm) in each direction at the inters

The firebox and all other components constructed of refractory units should be placed using a fireclay mortar conforming to ASTM C 105, medium duty. Other refractory mortars have also been used successfully, and thus any high temperature-resist

AIR INLET VENT
TYPICAL BRICK
BAFFLE
EXTERIOR AIR
INLET
AIR OUTLET
VENT

Air-Circulating Fireplaces
By circulating room air behind the combustion chamber, through brick baffles, additional heat can be delivered to the

WIRE TIE
STEEL CHANNEL
DOVETAIL ANCHOR
MINIMUM 1"(25mm)
AIRSPACE
BUILDING PAPER
(OPTIONAL)
RIGID
SHEATHING
SELF-TAPPING
CORROSION-RESISTANT
METAL SCREWS
CONCRETE FLOOR
SLAB
FLASHING
BRICK V

Lintels may be of reinforced brick masonry, steel angles, or precast concrete. Reinforced brick masonry and steel angle lintels are the most commonly used in brick veneer construction. The minimum required bearing length for steel angle lintels is 4 in.

BUILDING PAPER
BRICK VENEER
8d NAIL
CORRUGATED METAL TIE
1 (25 mm) AIR SPACE
FLASHING
WEEPHOLES @ 24"
(600 mm) O.C.
FINISHED GRADE

BRICK VENEER
CORRUGATED
METAL TIE
1 (25 mm) AIR SPACE
FL

Guide Specification
Notes

PART I GENERAL
# 1.01 DESCRIPTION

A. Related Work Specified Elsewhere:

1. Concrete work: Section 03.
2. Masonry: Section 04.
3. Rough carpentry: Section 06.
4. Structural steel and

Concrete Masonry Unit Shapes

Concrete masonry units are available in a wide variety of shapes and sizes to accommodate various construction needs. The use of 6-inch and 8-inch high units is larger than with 3-core units, facilitating placement o