FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Hall David Graham
  2. Issuer Name and Ticker or Trading Symbol
Concrete Pumping Holdings, Inc. [BBCP]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
C/O INDUSTREA ACQUISITION CORP., 28 WEST 44TH STREET, SUITE 501
3. Date of Earliest Transaction (Month/Day/Year)
12/06/2018
(Street)

NEW YORK, NY 10036
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Class A Common Stock 12/06/2018   M   28,750 A (1) 28,750 D  
Class A Common Stock 12/06/2018   J(2)   28,750 D (2) 0 D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Class B Common Stock (1) 12/06/2018   M     28,750 (1)   (3)   (3) Class A Common Stock 28,750 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Hall David Graham
C/O INDUSTREA ACQUISITION CORP.
28 WEST 44TH STREET, SUITE 501
NEW YORK, NY 10036
  X      

Signatures

 /s/ Joel Rubinstein, Attorney-in-Fact   12/10/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Immediately prior to the consummation of the Concrete Pumping Holding, Inc.'s initial business combination on December 6, 2018 (the "business combination"), each outstanding share of Industrea Acquisition Corp.'s Class B common stock, par value $0.0001 per share (the "Founder Shares"), was converted into one share of the Industrea's Class A common stock, par value $0.0001 ("Industrea common stock"). The Reporting Person held 28,750 Founder Shares prior to the business combination, which were converted into 28,750 shares of Industrea common stock immediately prior to the business combination.
(2) Upon consummation of the business combination, each share of outstanding Industrea common stock was exchanged for one share of the Concrete Pumping Holding, Inc.'s common stock, par value $0.0001 per share ("BBCP common stock"), and Industrea Acquisition Corp. became a wholly owned subsidiary of Concrete Pumping Holdings, Inc. The Reporting Person held 28,750 shares of Industrea common stock at the time of the business combination, which were exchanged for 28,750 shares of BBCP common stock upon consummation of the business combination.
(3) The Founder Shares were convertible for shares of Industrea Acquisition Corp.'s Class A common stock as described under the heading "Description of Securities - Founder Shares" in Industrea Acquisition Corp.'s registration statement on Form S-1 (File No. 333-219053) and had no expiration date.

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