| CONSTRUCTION Product Delivery, Storage and Handling
- Deliver materials to job site in dry condition and advance
of freezing temperatures. Keep materials dry until use.
- Carefully unload masonry units to avoid damage to edges and
faces.
- Store materials under waterproof cover on pallets or plank
platforms held off ground by means of plank or timber skids.
Cold Weather Work
- Comply with CAN3 A371 and the following:
- Use dry, unfrozen masonry units. Maintain temperature of
mortar between 5° C and 50° until use.
- Building on frozen work is prohibited. Remove sections of
frozen and damaged masonry before continuing construction of that section.
- Do not use scorched sand, salts or antifreeze admixtures.
- Protect freshly laid-masonry from drying too rapidly by
means of waterproof, non staining coverings.
Protection
- Keep work dry using waterproof, non-staining coverings that
extend over walls and down sides sufficient to protect walls from wind driven rain, until
work is completed and protected by flashings or other permanent construction.
- Protect work from marking and mortar droppings.
- Temporary brace work during and after erection until
permanent lateral support is in place.
WALL TIES
- Wood stud ties : DA213 by Dur-O- Wall Limited or BL310
series by Blok-Lok Limited,sized to suit insulation.
- Metal stud ties ; Stud Lok by Blok-Lok limited or other
approved equivalents, sized to suit insulation.
- Corrugated metal ties : Galvanized 1" x 1/28"
(25mm x 0,89mm) thick steel or required length.
- Galvanizing : Hot dip galvanized all masonry ties to
requirements of ASTM A153 Class B2
Building-In
- Prevent displacement of build-in items during construction.
Check plum, location and alignment frequently as work progresses.
- Brace door and window jambs to maintain plumb. Fill spaces
between jambs and masonry with mortar.
- Leave 1/4" (6mm) space below shelf angles.
- Install loose steel lintels and bearing plates. Center over
opening width. Grout under lintels and bearing plates at each jamb with full bed of
mortar.
Masonry Units
- Layout coursing and bond to achieve correct coursing
heights, and continuity of bond above and below openings, with minimum of cutting. Provide
specially-shaped masonry units required and shown on Drawings.
- Do not use units which are broken, spoiled or contrasting in
appearance. Provide satisfactory blending of tones and textures. Lay masonry units in full
bed mortar. Maintain uniform joint widths.
- Remove chipped, cracked, and damaged units in exposed
masonry and replace with undamaged units.
- Do not carry any portion of a wall more than 3’0"
(900mm) above any other portion of wall. Rack down between levels.
- Provide temporary bracing as required by the authorities
having jurisdiction for masonry walls 12’0" (3600mm) or more in height until
such time as permanent lateral support for the wall is installed. (Spec Note: use the
following two paragraphs for cavity wall construction.)
- For cavity wall construction, keep cavities free of mortar.
- Install weep hole vents in vertical joints immediately over
flashings, in exterior wythes of cavity wall and masonry veneer wall construction, at
maximum horizontal spacing of 24" (600mm).
Jointing
- Lay all joints 3/8"(10mm) thick unless otherwise
specified or indicated on drawings.
- Allow joints to set just enough to remove excess water, then
tools with ¾" (15mm) diameter non-staining tool to provide smooth, compressed,
uniformly concave joints. Avoid raked joints.
Masonry Flashing
- Provide flashings under exterior masonry bearing on
foundation walls, slabs, shelf angles and steel angles over openings. Provide flashings
under weep hole courses and as indicated.
Control Joints
Provide continuous control joints as indicated and if not
indicated, at a maximum 20’(6000mm) o.c. in continuous walls. Wherever possible,
locate control joints at one side of door or window openings.
Where joint is to receive sealant, rake back joint depth
½" (12mm) neatly tool squared and smooth.
Quality Assurance
Do masonry work in accordance with CAN3-A370, Can3-371 and
Can3-S304 and requirements of authorities having jurisdiction. |
