LiteCel CD Board & Tie Calculator

The wall

Gross wall area

m²

Openings — total area

m²

Deducted from the board count AND the field ties.

Openings — total jamb length

Both jambs of every opening: 2 × height, added up. Extra ties go here — see below.

Movement / control joints — total length

The build-up

Inner leaf thickness

This changes the tie count more than anything else on this page.

LiteCel CD boards, nested

Each extra board adds 35 mm: its knob plugs into the socket behind the one above.

Waste / breakage allowance

Commercial, not code. Edit it or set it to 0.

What to order

LiteCel CD boards

—

Wall ties

—

Net wall area

— m²

Tie bundles of 100

—

The ties, in detail

Item	Value	Where it comes from
Cavity width	—	Board build-up
Tie length required	—	L ≥ cavity + 100 (50 mm embedment each leaf)
Tie type	—	SANS 10164-1 5.2.1.4(b), (c)
Code minimum	—	SANS 10164-1 table 7
LiteCel setting-out	—	425 × 600 = one board height
Used	—	The greater of the two
Field ties	—	net area × ties/m²
Extra at jambs	—	≤300 mm of height, 5.2.1.4(a)
Extra at joints	—	≤300 mm of height, 5.2.1.4(a)

Thermal

Board + cavity, R

— m²K/W

EPS thickness

— mm

These R-values are estimates. They are derived the same way the LiteCel brochure derives its own — from the declared grade, at λ ≈ 0,036 W/m·K — and no guarded-hot-box test exists for this board. Confirm with Technopol before relying on them in a SANS 10400-XA submission.

This is a take-off, not a design. Tie type, spacing, embedment, material and corrosion protection for any particular wall remain the designer's responsibility — SANS 28 appendix B puts the duty to specify on the purchaser. Coastal: within 30 km of the coast SANS 10400-K 4.2.1.4 calls for galvanising, not stainless; stainless is required only in tidal splash zones.