Preliminary statics

Floor design

Are you designing the floor for a school, an office, or a multi-family house?

For each application, the desired span can be selected in the drop-down menu. The required component dimensioning of LIGNATUR surface elements is displayed graphically. The floor structures shown are recommendations, tailored to the application.

Do you have any further questions? We'll be glad to advise you.

Contact details consultants
E-Mail

Static System – single-span beam

Ultimate limit state, serviceability limit state, and vibration design are fulfilled for all floor systems shown.

deflection w (q_d) = l / 350

q_d = (1 + k_def) ∙ (g_k + ѱ₁ ∙ q_k)
creep coefficient k_def = 0.6
permanent load g_k = g + q_A
dead load incl. fill g
load of floor construction q_A
imposed load q_k = q_N
housing q_N = 2 kN/m², ѱ₁ = 0.5
education q_N = 3 kN/m², ѱ₁ = 0.7

1. Natural frequency f₁ (g_k) ≥ 8.0 Hz or 8.0 Hz > f₁(g_k) ≥ 5.1 Hz.
The first natural frequency is calculated only with permanent loads. Vibration acceleration a (g_k) ≤ 0.1 m/s², deflection w (F = 1 kN) ≤ 0.25 mm.

Multi-family house

Selected floor structure with Schallschutzprotokoll 4130
Cement screed 50mm
Mineral fibre footfall sound insulation 40mm
Bonded chippings 70mm
LIGNATUR surface element (LFE) silence 12

Possible span of LIGNATUR

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 214 kg/m²
Self-weight g: 63 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 214 kg/m²
Self-weight g: 64 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 214 kg/m²
Self-weight g: 67 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 214 kg/m²
Self-weight g: 70 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 214 kg/m²
Self-weight g: 73 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 214 kg/m²
Self-weight g: 76 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 214 kg/m²
Self-weight g: 82 kg/m²

^{*Execution only after positive agreement with Lignatur}

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 214 kg/m²
Self-weight g: 82 kg/m²

^{*Execution only after positive agreement with Lignatur}

School building

Selected floor structure with Schallschutzprotokoll 4146
Cement screed 50mm
Mineral fibre footfall sound insulation 40mm
Bonded chippings 60mm
LIGNATUR surface element (LFE) silence 12 with acoustics

Possible span of LIGNATUR

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 220 kg/m²
Self-weight g: 68 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 220 kg/m²
Self-weight g: 69 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 220 kg/m²
Self-weight g: 71 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 220 kg/m²
Self-weight g: 74 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 220 kg/m²
Self-weight g: 77 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 220 kg/m²
Self-weight g: 80 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 220 kg/m²
Self-weight g: 85 kg/m²

^{*Execution only after positive agreement with Lignatur}

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 220 kg/m²
Self-weight g: 85 kg/m²

^{*Execution only after positive agreement with Lignatur}

Office building

Selected floor structure with Schallschutzprotokoll 4329
Knauf GIFAfloor 100mm, FHB 32mm
Cement screed 50mm
Mineral fibre footfall sound insulation 40mm
LIGNATUR surface element (LFE) silence 12 with acoustics

Possible span of LIGNATUR

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 176 kg/m²
Self-weight g: 88 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 176 kg/m²
Self-weight g: 89 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 176 kg/m²
Self-weight g: 92 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 176 kg/m²
Self-weight g: 95 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 176 kg/m²
Self-weight g: 98 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 176 kg/m²
Self-weight g: 101 kg/m²

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 176 kg/m²
Self-weight g: 107 kg/m²

^{*Execution only after positive agreement with Lignatur}

Variable action q_N: 300 kg/m²
Load of floor construction q_A: 176 kg/m²
Self-weight g: 107 kg/m²

^{*Execution only after positive agreement with Lignatur}

Design renovation

Are you planning to renovate your detached house?

For each application, the desired span can be selected in the drop-down menu. The required component dimensioning of LIGNATUR box elements is displayed graphically.

Do you have any further questions? We'll be glad to advise you.

Contact details consultants
beratung@lignatur.ch

Static System – single-span beam

Ultimate limit state, serviceability limit state, and vibration design are fulfilled for all floor systems shown.

deflection w (q_d) = l / 350

q_d = (1 + k_def) ∙ (g_k + ѱ₁ ∙ q_k)
creep coefficient k_def = 0.6
permanent load g_k = g + q_A
dead load incl. fill g
load of floor construction q_A
imposed load q_k = q_N
housing q_N = 2 kN/m², ѱ₁ = 0.5

Single-family house renovation

Selected floor structure:
Fermacell screed element 25mm
wood fibre footfall sound insulation 20mm
OSB board 12 mm
LIGNATUR box element (LKE) with fill 45 kg/m2

Possible span of LIGNATUR

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 41 kg/m²
Self-weight g: 86 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 41 kg/m²
Self-weight g: 89 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 39 kg/m²
Self-weight g: 92 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 39 kg/m²
Self-weight g: 95 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 39 kg/m²
Self-weight g: 98 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 39 kg/m²
Self-weight g: 101 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 39 kg/m²
Self-weight g: 104 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 39 kg/m²
Self-weight g: 107 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 41 kg/m²
Self-weight g: 107 kg/m²

Gallery renovation

Decisive for the "Gallery" renovation is the deflection of l/500. The vibration design is not carried out for the box element without floor structure.

Selected floor structure:
LIGNATUR box element (LKE)

Possible span of LIGNATUR

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 0 kg/m²
Self-weight g: 38 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 0 kg/m²
Self-weight g: 41 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 0 kg/m²
Self-weight g: 44 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 0 kg/m²
Self-weight g: 47 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 0 kg/m²
Self-weight g: 50 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 0 kg/m²
Self-weight g: 53 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 0 kg/m²
Self-weight g: 59 kg/m²

Variable action q_N: 200 kg/m²
Load of floor construction q_A: 0 kg/m²
Self-weight g: 62 kg/m²

Static roof – snow load 100 kg/m2

Are you planning a roof for a sports hall or an indoor swimming pool?

The desired span for the roof can be selected in the drop-down menu. The required component dimensioning of LIGNATUR surface elements is displayed graphically.

Do you have any further questions? We'll be glad to advise you.

Contact details consultants
beratung@lignatur.ch

Static System – single-span beam

Ultimate limit state and serviceability limit state design are fulfilled for all roof systems shown.

deflection w (q_d) = l / 350

q_d = (1 + k_def) ∙ (g_k + ѱ₁ ∙ q_k)
creep coefficient k_def = 0.6
permanent load g_k = g + q_A
dead weight of element g
load roof structure q_A
imposed load q_k = μ ∙ s_K
coefficient of roof shape μ = 0.8
snow load s_K = 1 kN/m², ѱ₁ = 0.5

Roof membrane

Selected roof structure:
Polymer bitumen membrane 2nd layer
Polymer bitumen membrane 1st layer
Thermal insulation
Vapour barrier
LIGNATUR surface element (LFE)

Possible span of LIGNATUR

Snow load s_k: 100 kg/m²
Load roof structure q_A: 20 kg/m²
Dead weight of element g: 33 kg/m²

Snow load s_k: 100 kg/m²
Load roof structure q_A: 20 kg/m²
Dead weight of element g: 35 kg/m²

Snow load s_k: 100 kg/m²
Load roof structure q_A: 20 kg/m²
Dead weight of element g: 36 kg/m²

Snow load s_k: 100 kg/m²
Load roof structure q_A: 20 kg/m²
Dead weight of element g: 38 kg/m²

Snow load s_k: 100 kg/m²
Load roof structure q_A: 20 kg/m²
Dead weight of element g: 39 kg/m²

Snow load s_k: 100 kg/m²
Load roof structure q_A: 20 kg/m²
Dead weight of element g: 41 kg/m²

Snow load s_k: 100 kg/m²
Load roof structure q_A: 20 kg/m²
Dead weight of element g: 42 kg/m²

Snow load s_k: 100 kg/m²
Load roof structure q_A: 20 kg/m²
Dead weight of element g: 45 kg/m²

Snow load s_k: 100 kg/m²
Load roof structure q_A: 20 kg/m²
Dead weight of element g: 48 kg/m²

Snow load s_k: 100 kg/m²
Load roof structure q_A: 20 kg/m²
Dead weight of element g: 51 kg/m²

Snow load s_k: 100 kg/m²
Load roof structure q_A: 20 kg/m²
Dead weight of element g: 57 kg/m²

^{*Execution only after positive agreement with Lignatur}

Roof membrane with acoustics

Selected roof structure:
Polymer bitumen membrane 2nd layer
Polymer bitumen membrane 1st layer
Thermal insulation
Vapour barrier
LIGNATUR surface element (LFE) with acoustics