Window Sill Masonry

Window Sill, Lintel and Headstone

Window Sill, Lintel and Headstone

Lintels may be reinforced and made to bear on the wall or they may be supported by a shelf angle. The relation of the angle with the bottom or top of brick joint determines if checkouts are required at the bottom of the lintel and headstone. If the bottom of the angle is in line with the top of the joint, then a checkout is required. When the bottom of the angle is at the bottom of the brick joint, the stone will rest on top of the angle. No checkout is required when using a 5/16″ or 3/8″ thick angle.

The details explain that overall dimensions must match brick coursing. Brick coursing tables should be used to determine height of sills. Position of angle as explained above also affects the sill height as sash dimensions are figured from the bottom of the angle.

Anchor slots are provided in the tops of headstones and band stones for anchoring stones to the wall. Where 1″+ projections occur, water drips are provided to stop rain water from running down the sash and face walls. This prevents staining of the walls.

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The majority of conventional masonry details are similarly used in metal stud walls. A continuous slot is cast in tops of stone for anchoring. This facilitates alignment of 1/8″ x 1″ wide stainless steel anchor strap to studs.

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© 2016 Russell Cast Stone, Inc. All Rights Reserved.

Window Sill and Head Band

Window Sill and Head Band

(includes general notes about reinforcement)

Cast Stone is stronger than most natural cut building stones and therefore will generally require no reinforcing when used as a replacement for natural cut stone.

When desired, Cast Stone can offer the beauty of natural stone with the structural advantages of precast concrete by including reinforcing bars in the design. Design reinforcement the same as for precast concrete except that wire mesh and reinforcing cage assemblies should not be used. Instead use deformed bars meeting the requirements of ASTM A615. We use grade 60 epoxy-coated bars in all cases where reinforcement is shown.

Where reinforcing is required due to structural stress, temperature changes or safety in handling large pieces, refer to Specification Section on reinforcing.

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© 2016 Russell Cast Stone, Inc. All Rights Reserved.

Window Sills, Lug and Slip Type

Window Sills, Lug and Slip Type

Window sills are shown here using two profiles, straight face and bullnose. Different type lugs are detailed. Where sills project, lugs are set back from the face of the sill to line up the brickwork. Heights of lugs are figured to match brick coursing minus one joint. The top of the lug may not always match the top of the sill upset in height. The relationship varies due to changing sash heights which alter the elevation of the sill upset. The lug height is fixed to match brick coursing.

Slip sills have no lugs and the lengths are figured 1/2″ less than the brick masonry opening. This allows for a 1/4″ joint at each end of the sill when pointing is desired.

Figure sill lengths 3/4″ less than masonry opening when sealants are desired. This provides 3/8″ joint for gun-in of sealant. Always prime joints prior to application of sealant.

Only the ends of lugged sills shall be embedded in mortar; balance of bed joint is left open and tuck pointed later. This prevents cracking of sills from future wall settlement.

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© 2016 Russell Cast Stone, Inc. All Rights Reserved.

Window Sills, Jambs and Headstone

Window Sills, Jambs and Headstone

This type window trim often used in school and industrial buildings is shown with a through sill. The inside face of this sill is finished and may be left exposed or painted over to match the wall finish.

Where columns occur checkouts are provided; clearances of 1/2″ on each side and 3/8″ on the face side of the column are standard dimensions.

The position of the steel beam at the head section allows the use of eye bolts and dowels at each joint. End head pieces are made with hooks cast in; eye bolts or J-bolts are fastened to this hook and bolted to the steel beam.

See hook details in Ashlar (Ashlar Facing Anchors and Anchoring of Ashlar Above Windows), and more in Anchor Hooks, Lifting Hooks and Inserts

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© 2016 Russell Cast Stone, Inc. All Rights Reserved.

Window Sill, Sill Band and Head Band

Window Sill, Sill Band and Head Band

Different type stones, sill, matching sill band and head band are shown.

Sill bands are designed to fit brick coursing with a bevel back to the wall line to match the window sill wash – two anchor slots are provided for tying bands to backing. Use one continuous slot for metal stud wall systems.

Strap anchors are used for anchoring the head band back to the masonry – an alternate detail is shown for tying to steel. Maintain return heads at same depth of section as shown for economy.

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© 2016 Russell Cast Stone, Inc. All Rights Reserved.