Aerospace Sourcing
Ground support equipment

Ground Support Equipment Fabrication for Launch and Spacecraft Programs

Ground support equipment is the hardware that lifts, moves, holds, services and tests flight hardware on the ground, and buying it well means specifying the right design standard, load test and weld code up front. Aerospace Sourcing matches GSE jobs to qualified fabricators, flows down those requirements and delivers one quote, one purchase order and a full cert package.

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What counts as ground support equipment

GSE is any non-flight equipment that touches, supports or services a launch vehicle, spacecraft or payload during build, test, transport and launch processing. NASA's GSE design standard, NASA-STD-5005, frames it the same way: equipment supporting space vehicle or payload programs, as distinct from the buildings and facility systems around it.

Typical fabricated GSE includes:

  • Lifting beams, spreader bars, strongbacks and lifting fixtures
  • Rotation and breakover fixtures that take a stage or payload from horizontal to vertical
  • Transport dollies, cradles, stands and shipping fixtures
  • Work platforms, access stands and protective covers
  • Fluid and gas servicing carts, pressurization panels and purge equipment
  • Test stands, load frames and handling adapters for qualification campaigns
  • Electrical GSE enclosures, cable assemblies and checkout consoles

The common thread is that a failure on the ground can damage hardware worth far more than the GSE itself, or hurt someone. That is why GSE comes with its own design standards and test regime rather than being treated as ordinary weldments.

Lifting equipment: the standards that apply

For below-the-hook lifting devices, the core pair is ASME BTH-1 for design and ASME B30.20 for marking, inspection, testing, maintenance and operation. Work at NASA sites adds NASA-STD-8719.9, and OSHA rules sit underneath all of them.

ASME BTH-1: design category and service class

BTH-1 classifies every lifter on two axes. The design category sets static strength: Design Category A, for predictable loads and well defined conditions, carries a nominal design factor of 2 and is limited to Service Class 0, while Design Category B, for less predictable loads or more severe conditions, carries a nominal design factor of 3. The service class sets fatigue life by the number of load cycles the device will see over its life. BTH-1 requires the design category and service class to be marked on the lifter and shown on quotations, drawings and related documents, so ask for them in the quote, not after delivery.

ASME B30.20 and proof testing

B30.20 governs the device once it exists: nameplate marking of rated load, inspection intervals, load testing, maintenance and use. Proof testing is the step buyers most often under-specify. Industry guidance notes that some makers issue a certificate stating a device was built to B30.20 and BTH-1 without any record that a proof test actually happened, so ask for the proof test record itself, showing the applied load and who witnessed it. On construction sites, OSHA's rule at 29 CFR 1926.251(a)(4) requires custom-design lifting accessories to be proof-tested before use to 125 percent of their rated load.

NASA-STD-8719.9 at NASA sites

NASA-STD-8719.9, the NASA lifting standard, applies to NASA-owned, rented, leased and contractor-supplied lifting devices and equipment used in support of NASA operations at NASA centers and facilities. Revision C, dated August 2024, is the active version. Points that matter to a GSE buyer:

  • Lifting equipment needs a proof load test before first use and again after repairs or modifications that affect load-bearing components, such as welding in the load path.
  • For below-the-hook lifting devices, the proof load value is the one specified in the applicable ASME standard (B30.20 or B30.26).
  • Periodic load tests for slings, rigging hardware and below-the-hook devices use a load of 0.95 to 1.00 times rated capacity.
  • A periodic load test is required within one year before use in a NASA critical lift, unless the device has been designated non-load-test with approval from the center's Lifting Devices and Equipment Manager.
  • Load positioning devices are proof tested at 1.20 to 1.25 times rated capacity, or as the designer recommends with that manager's concurrence.

If your equipment will be used at Kennedy Space Center or another NASA installation, put "NASA-STD-8719.9 applies" in the request so the fabricator plans the test and records accordingly.

Structural, welding and pressure system requirements

Most GSE is a welded structure, and the weld code on the drawing decides how welders are qualified and how welds are inspected. Get it right in the request.

  • AWS D17.1 is the fusion welding specification for aerospace applications. Its scope covers aerospace, support and non-flight hardware as well as flight hardware, across aluminum, nickel, iron, cobalt, magnesium and titanium based alloys. When a contract invokes it, conformance with all of its provisions is required.
  • AWS D1.1 is the structural welding code for steel, and AWS D1.2 covers structural aluminum, with a 2026 edition that is the first update since 2014. The two codes are independent of each other, so a steel welder's D1.1 qualification does not carry over to aluminum.
  • NASA-STD-5005 sets requirements and guidance for design and fabrication of GSE for NASA spaceflight programs. It is written to be tailored by contract. Kennedy Space Center publishes its own tailored version, KSC-DE-512-SM, which adds site-specific and local environment requirements.
  • NASA-STD-8719.17 covers ground-based pressure vessels and pressurized systems at NASA, which matters for servicing carts, panels and test stands that hold pressure. NASA policy requires those systems to be certified under it before operation.

The coastal environment deserves its own line in the spec. Salt air at the Cape is hard on carbon steel and on dissimilar metal joints, and KSC-DE-512-SM layers local environment requirements on top of NASA-STD-5005. Call out the coating system, fastener materials and any corrosion control requirements rather than leaving them to the fabricator's default.

Transport, handling and servicing equipment

Dollies, stands, rotation fixtures and servicing carts are not lifting devices in the B30.20 sense, but they carry the same flight hardware and deserve the same rigor. Treat the requirements sheet for them as seriously as the one for a lifting beam.

  • Loads beyond static weight. Road and floor transport add shock and vibration. State the transport mode, route surface and any limits the flight hardware has on acceleration so the design and any isolation system are sized for them.
  • Stability. Give the center of gravity of the hardware in each configuration, including partly assembled states, so tip-over margins can be checked during rotation and moves.
  • Interfaces. Mounting points on flight hardware are usually controlled by an interface drawing. Match hole patterns, fastener grades and torque values to it, and require a fit check if the interface is critical.
  • Mobility hardware. Casters, brakes, tow bars and leveling jacks should be rated for the load with margin and identified on the drawing, not left to the shop.
  • Fluid and electrical servicing. Carts and panels that connect to vehicles add pressure, cleanliness and grounding requirements, which bring in NASA-STD-8719.17 and your program electrical standards.

Paperwork to require on GSE

Ask for proof that the design is right, the welds are right, the materials are right and the device was tested. A GSE data package usually includes:

  • Design analysis or calculations, signed by the responsible engineer, showing the design factor used and the BTH-1 design category and service class for lifting devices
  • Drawings at the as-built revision
  • Material certifications for load path members and hardware
  • Welding procedure specifications, procedure qualification records and welder qualifications to the invoked code
  • Weld inspection and nondestructive examination reports
  • Proof load test record with the applied load, hold time, method and witness
  • Nameplate or marking showing rated load and any required identification
  • Cleanliness certification for fluid and gas GSE when a cleanliness level is specified
  • Certificate of conformance to the purchase order

Every order we deliver includes a certificate of conformance, and the other items above are flowed down to the fabricator when your request requires them.

What drives GSE lead time

Engineering and testing usually take longer than cutting and welding. Plan for these steps:

  1. Design and review. Build-to-print jobs start faster. Design-build jobs need analysis, drawing release and your review before material is ordered.
  2. Material. Structural steel and aluminum shapes are generally available. Stainless tube for fluid systems, certified hardware and specific plate thicknesses can be slower.
  3. Welding and inspection. Code welding with qualified welders and NDE adds hold points.
  4. Coatings. Paint or powder systems need cure time, and some coating systems need specific surface preparation.
  5. Proof testing. A large lifter needs a test setup, a calibrated load cell or test weights and a witness. Scheduling the witness can be the longest single wait.
  6. Cleaning. Precision or oxygen cleaning of fluid GSE is a separate process with its own queue.

We do not quote lead times until a fabricator has reviewed the package. A person replies within one business day, and rush requests are prioritized.

How to write a GSE request

State the load, the standard and the test before anything else. A fabricator can price steel quickly; what slows a GSE quote is not knowing which rules apply.

  • Drawings and models if build-to-print, or a requirements sheet if design-build
  • Rated load, center of gravity of the item being handled and any dynamic or tilt conditions
  • Standards invoked: ASME BTH-1 design category and service class, ASME B30.20, NASA-STD-8719.9, NASA-STD-5005 or KSC-DE-512-SM tailoring, AWS weld code, pressure system standard
  • Proof test requirement and whether you or a customer will witness
  • Coating system and corrosion requirements for the use location
  • Cleanliness level for fluid and gas equipment
  • Delivery location, crating and transport limits
  • Export control status of the drawings and the flight hardware interface data

Interface data for the flight hardware is often more sensitive than the GSE drawings. Our confidentiality page explains how controlled files move.

Cost, local fabrication and launch programs

GSE pricing is driven by engineering hours, material, weld and inspection labor, coatings, test setup and the documentation package. Our GSE fabrication cost guide breaks those down.

Large GSE is expensive to ship, so location matters. Our Space Coast GSE fabrication page covers sourcing close to the Cape, and our page for launch providers covers how we support launch programs that need GSE alongside machined parts and test time.

How Aerospace Sourcing handles a GSE job

We do not run a fabrication shop. We match your job to fabricators whose welding qualifications, capacity and quality system fit, then manage the work to delivery.

  • One quote, one lead time, one point of contact and one purchase order, even when a fabricator, a coater, a cleaning house and a test provider are all involved
  • Design standards, weld codes, test and cleanliness requirements flowed down to each supplier
  • Every supplier signs a flow-down NDA before seeing your data and does not learn the end customer unless you approve
  • Paperwork checked before shipment, with a certificate of conformance on every order

We cannot promise a supplier for every job. If a lifting device needs a capability we cannot match, we will tell you.

Request a GSE quote

Use the ground support equipment quote form, which is preset for GSE so your rated load, standards and test requirements are captured up front. Fabricators can quote faster when the load test and weld code are known from the first message, and a person will reply within one business day.

Questions

What is the difference between ASME B30.20 and ASME BTH-1?

BTH-1 is the design standard for below-the-hook lifting devices. It sets the design category, which drives the nominal design factor, and the service class, which drives fatigue life. B30.20 covers what happens after design: marking, inspection, load testing, maintenance and operation. Most lifting fixture purchases should invoke both, with the design category and service class stated in the request so the fabricator designs and quotes to them.

What proof load should a lifting fixture be tested to?

It depends on which rules govern the use. NASA-STD-8719.9 Revision C points to the applicable ASME standard for below-the-hook devices, and OSHA's construction rule at 29 CFR 1926.251(a)(4) requires custom lifting accessories to be proof tested to 125 percent of rated load. Your program or site safety office decides the governing value. State it in the request and require a test record showing the actual applied load.

Does NASA-STD-8719.9 apply to contractor equipment?

Yes, when it is used in support of NASA operations. The standard's applicability covers NASA-owned, rented and leased lifting equipment and contractor-supplied lifting devices and equipment used at NASA centers and facilities. If your GSE will be used at a NASA installation, tell the fabricator up front so the design, test and documentation meet the standard instead of being retrofitted after delivery.

Which weld code should I put on a GSE drawing?

Use the one your program requires. AWS D17.1 covers fusion welding for aerospace applications and explicitly includes support and non-flight hardware. AWS D1.1 covers structural steel and AWS D1.2 covers structural aluminum. Some programs invoke D17.1 for anything that touches flight hardware and D1.1 for platforms and stands. Whatever you choose, require welder qualifications and inspection records to the same code.

Can you build GSE to a KSC tailored standard?

We can flow down KSC-DE-512-SM, the Kennedy Space Center tailored version of NASA-STD-5005, or any program tailoring of it, to the fabricator. The tailoring document should be attached to the request with the applicable paragraphs identified. Because it adds site-specific and local environment requirements, it often changes coatings, materials and documentation, so it needs to be known at quote time.

Do you handle precision cleaning for fluid GSE?

We can include cleaning in the same order when your request specifies the cleanliness level and the governing specification. Precision and oxygen service cleaning is usually done by a separate process house after fabrication and pressure testing, so it adds its own step to the schedule. You still receive one purchase order and one cert package covering fabrication, testing and cleaning.

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