EXAMPLE 1
(THRU BOLTING)
EXAMPLE 2
(LAG BOLTING)
WALL ANCHOR GUIDELINE
WALL ANCHOR GUIDELINE
www.jaypro.com / (800) 243-0533 / 976 Hartford Tpke, Waterford, CT 06385 USA
SUBJECT TO CHANGES IN DESIGN AND MANUFACTURING
© COPYRIGHT 2022 JAYPRO SPORTS, LLC. ALL RIGHTS RESERVED
Sheet 8 of 10
INNOVATION, PERFORMANCE AND COMMITMENT SINCE 1953
METAL / WOOD STUD WALLS
For studded walls, additional blocking is required to support the backstop. A Structural Engineer must review the wall
structure to ensure the wall is capable of supporting the equipment, even if blocking is installed. It is not advisable to
install a wall mounted backstop on a 2x4 studded wall. Blocking locations are directly related to the equipment geometry
(style of unit and extension off the wall). Before any walls are closed off with sheetrock or paneling, the dealer and/or
backstop installer must inspect the blocking to ensure requirements are met. Document blocking with photos for
reference and request approval of blocking before installing wall finish. Depth of blocking must be documented to
ensure the proper anchors are procurred by the installer.
Design, materials, labor for the additional blocking and plywood spacers are the responsiblity of the contractor
(not Jaypro, dealer, nor equipment installer).
Blocking Material:
Typically, blocking is constructed of 2x10 or 2x12 premium douglas fir lumber, sized larger than the
southern yellow pine. Blocking is typically 2 or 3 layers, sistered into the wall studs, vertically orientated only. Another
alternative that may be chosen is to use LVL beams sistered into the wall studs.
Sheetrock / Gypsum Board / AWP:
Any layer of sheetrock / gypsum board must be removed and replaced with
plywood. Sheetrock is not structural and if left between the stringers and blocking, wall anchors may loosen over time.
Plywood spacer can be made the same size as the wood stringers or slightly smaller. Acoustic wall panels (AWP) must
be modified and cut around the wood stringers. Backstop wood stringers cannot be modified to fit around AWP.
Recommended Anchors:
Thru-bolting is the preferred method of attachment. Wood lag screws are also acceptable
(1/2" diameter minimum). For wood lag screws, drill the proper pilot holes based on the blocking material selected. Use
of impact wrench is strictly prohibited.
Hand tighten only.
Use bees wax on lag screws for smooth installation of lag
screws.
LAG SIZE
SOFT WOOD
HARD WOOD
MEDIUM WOOD
Groups III & IV
Groups II
Groups I
1/2"
5/8"
3/4"
15/64"
5/16"
13/32"
29/64"
11/32"
9/16"
13/32"
5/16"
1/2"
LAG BOLT PILOT HOLE SIZES
Group I: Oak, Maple, White Ash
Group II: Douglas Fir, Southern Yellow Pine
Group III & IV: White or Eastern Pine, Poplar, Hemlock, Spruce
WOOD BLOCKING
STUD WALL
SHEETROCK
PLYWOOD SPACER
THRU-BOLTS WITH
BACKER PLATES
BACKSTOP
WOOD STRINGER
BACKSTOP
WOOD STRINGER
PLYWOOD SPACER
SHEETROCK
WOOD BLOCKING
STUD WALL
LAG BOLTS WITH
WASHER
