SPANBEST Wind & Snow Load Calculation Report Template

Template only. All project values remain TBD until site, code, geometry and operational inputs are confirmed.

SPANBEST WIND & SNOW LOAD CALCULATION REPORT TEMPLATE

PROJECT: TBD
SITE LOCATION / COORDINATES: TBD
GOVERNING CODE & EDITION: TBD
BUILDING SYSTEM / SPAN / LENGTH / HEIGHT: TBD
RISK / IMPORTANCE CATEGORY: TBD
PREPARED BY / CHECKED BY / REVISION: TBD
IMPORTANT: This is a calculation-book template and scope guide, not a construction calculation for a specific project. Final values require confirmed site data and licensed engineer review.

1.1 Site address, coordinates, elevation and terrain photographs — TBD
1.2 Required building use, occupancy, clear span, length, eave/apex clearance — TBD
1.3 Door status, opening dimensions, airlocks and operational open-door cases — TBD
1.4 Local wind map reference, basic/design wind speed and return period — TBD
1.5 Ground snow value, altitude, exposure, thermal condition and drifting obstructions — TBD
1.6 Geotechnical report, allowable bearing pressure, frost depth and groundwater — TBD
1.7 Collateral loads: MEP, cranes, conveyors, photovoltaic equipment and suspended services — TBD
1.8 Governing local code, national annex and authority requirements — TBD

2.1 Confirm velocity basis, averaging time, return period and risk category.
2.2 Select terrain/exposure category and compute height-dependent exposure factor.
2.3 Determine topographic, directionality, elevation and importance factors required by the governing code.
2.4 Calculate design velocity pressure q(z) using code-specific coefficients; every coefficient is reported in a traceable table.
2.5 Select external pressure coefficients for roof, walls, end zones, corners and open canopies.
2.6 Select internal pressure cases from enclosure classification and door/opening conditions.
2.7 Resolve net pressures by surface and load direction; include dominant-opening and open-door cases where relevant.
2.8 Generate global wind cases by principal axes, oblique directions and uplift combinations.
2.9 Apply pressures to the 3D analysis model and verify members, bracing, connections, membranes/cable nets and anchors.
PROJECT WIND VALUES: ALL TBD UNTIL LOCATION AND CODE INPUTS ARE CONFIRMED.

3.1 Confirm characteristic ground snow from the governing map/authority and site altitude.
3.2 Establish exposure, thermal, importance and roof-shape factors required by the selected code.
3.3 Calculate balanced roof snow for the actual barrel, gable, arch or membrane geometry.
3.4 Evaluate unbalanced loading, sliding snow and asymmetric accumulation.
3.5 Check drifting at steps, parapets, adjacent higher roofs, valleys, doors and equipment obstructions.
3.6 Check rain-on-snow or ponding where required by the governing jurisdiction.
3.7 Generate governing snow patterns and combine with permanent, wind, seismic and collateral actions.
3.8 Verify members, local panels, membrane pretension, cable-net forces, connections and foundation reactions.
PROJECT SNOW VALUES: ALL TBD UNTIL SITE, ALTITUDE, THERMAL AND EXPOSURE DATA ARE CONFIRMED.

4.1 Permanent load D — self-weight and fixed equipment: TBD.
4.2 Imposed/service load L — occupancy and maintenance: TBD.
4.3 Wind W — positive pressure, suction, uplift and internal pressure patterns: calculated per project.
4.4 Snow S — balanced, unbalanced and drifted patterns: calculated per project.
4.5 Seismic/thermal/accidental actions — included when required by the governing code.
4.6 ULS / LRFD combinations — table generated directly from selected code edition.
4.7 SLS / ASD combinations — deflection, drift, ponding, vibration and membrane serviceability.
4.8 Second-order P-Delta, buckling/eigenvalue and geometric non-linear analysis where applicable.
4.9 Utilization table by member/connection; allowable criteria documented and checked.

5.1 Support node compression, uplift, shear and moment envelopes for every governing combination.
5.2 Base-plate, anchor-bolt, ring-beam or cable-anchor reactions for local civil design.
5.3 Foundation layout coordinated with actual soil parameters and frost/seismic conditions.
5.4 3D model views and load maps.
5.5 Member and connection check summaries.
5.6 Roof/membrane/cable-net force and pretension schedules where applicable.
5.7 Deflection and drift plots.
5.8 Reaction tables in PDF and spreadsheet format.
5.9 General arrangement, elevations, details and fabrication/installation drawings.
5.10 Licensed engineer stamp where included in the agreed jurisdictional scope.

INPUT REVIEW: project location, geometry, openings, use and code confirmed.
INDEPENDENT CHECK: load inputs, coefficients, combinations and model restraints reviewed.
SENSITIVITY: door-open, unbalanced snow, drift and uplift cases assessed.
MODEL QA: units, mesh/member connectivity, releases, supports and stiffness verified.
OUTPUT QA: governing utilization, displacement and reaction envelopes reviewed.
CLIENT HOLD POINT: calculation basis issued for approval before fabrication release.
REVISION CONTROL: every design change logged and calculations rerun.
FINAL STATUS: NOT FOR CONSTRUCTION until inputs are confirmed, review complete, and final documents are issued.